------------------------------
                               UNITED STATES                                OMB APPROVAL
                    SECURITIES AND EXCHANGE COMMISSION             ------------------------------
                          Washington, D.C. 20549                   OMB Number 3235-0145
                                                                   ------------------------------
                                                                   Expires:   February 28, 2009
                                                                   ------------------------------
                                                                   Estimated average burden
                                                                   hours per response . . . 10.4


                                  SCHEDULE 13G


                    Under the Securities Exchange Act of 1934
                               (Amendment No. 2)


                            Placer Sierra Bancshares
-------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
-------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    726079106
-------------------------------------------------------------------------------
                                 (CUSIP Number)

                                  May 31, 2006
-------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

        |x|       Rule 13d-1(b)

                  Rule 13d-1(c)

                  Rule 13d-1(d)


*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).








                               PAGE 1 OF 11 PAGES





----------------------                                    ---------------------
CUSIP No. 726079106                 13G                   Page  2  of  11 Pages
----------------------                                    ---------------------

-------------------------------------------------------------------------------
        
    1      NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only).

           Manulife Financial Corporation

-------------------------------------------------------------------------------
    2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*      (a)  |_|
                                                                  (b)  |_|
           N/A
-------------------------------------------------------------------------------
    3      SEC USE ONLY

-------------------------------------------------------------------------------
    4      CITIZENSHIP OR PLACE OF ORGANIZATION

           Canada

-------------------------------------------------------------------------------
                       5     SOLE VOTING POWER

                             -0-
                       --------------------------------------------------------
    Number of          6     SHARED VOTING POWER
      Shares
   Beneficially              -0-
     Owned by          --------------------------------------------------------
       Each            7     SOLE DISPOSITIVE POWER
    Reporting
      Person                 -0-
       With            --------------------------------------------------------
                       8     SHARED DISPOSITIVE POWER

                             -0-
-------------------------------------------------------------------------------
    9      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           None, except through its indirect,  wholly-owned subsidiaries, MFC
           Global  Investment   Management  (U.S.A.)  Limited,  John  Hancock
           Advisers,  LLC,  Sovereign Asset  Management LLC, and Independence
           Investments  LLC.  Independence  Investments  LLC  ceased  being a
           subsidiary following the close of business on May 31, 2006.

-------------------------------------------------------------------------------
   10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

           N/A
-------------------------------------------------------------------------------
   11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

           See line 9 above.
-------------------------------------------------------------------------------
   12      TYPE OF REPORTING PERSON*

           HC
-------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!
                               PAGE 2 OF 11 PAGES





----------------------                                    ---------------------
CUSIP No. 726079106                 13G                   Page  3  of  11 Pages
----------------------                                    ---------------------

-------------------------------------------------------------------------------
        
    1      NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only).

           MFC Global Investment Management (U.S.A.) Limited

-------------------------------------------------------------------------------
    2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*      (a)  |_|
                                                                  (b)  |_|
           N/A
-------------------------------------------------------------------------------
    3      SEC USE ONLY

-------------------------------------------------------------------------------
    4      CITIZENSHIP OR PLACE OF ORGANIZATION

           Canada

-------------------------------------------------------------------------------
                       5     SOLE VOTING POWER

                             787
                       --------------------------------------------------------
    Number of          6     SHARED VOTING POWER
      Shares
   Beneficially              -0-
     Owned by          --------------------------------------------------------
       Each            7     SOLE DISPOSITIVE POWER
    Reporting
      Person                 787
       With            --------------------------------------------------------
                       8     SHARED DISPOSITIVE POWER

                             -0-
-------------------------------------------------------------------------------
    9      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           787
-------------------------------------------------------------------------------
   10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

           N/A
-------------------------------------------------------------------------------
   11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

           .005%
-------------------------------------------------------------------------------
   12      TYPE OF REPORTING PERSON*

           IA
-------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!
                               PAGE 3 OF 11 PAGES





----------------------                                    ---------------------
CUSIP No. 726079106                 13G                   Page  4  of  11 Pages
----------------------                                    ---------------------

-------------------------------------------------------------------------------
        
    1      NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only).

           Independence Investments, LLC

-------------------------------------------------------------------------------
    2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*      (a)  |_|
                                                                  (b)  |_|
           N/A
-------------------------------------------------------------------------------
    3      SEC USE ONLY

-------------------------------------------------------------------------------
    4      CITIZENSHIP OR PLACE OF ORGANIZATION

           Delaware
-------------------------------------------------------------------------------
                       5     SOLE VOTING POWER

                             573,353
                       --------------------------------------------------------
    Number of          6     SHARED VOTING POWER
      Shares
   Beneficially              127,000
     Owned by          --------------------------------------------------------
       Each            7     SOLE DISPOSITIVE POWER
    Reporting
      Person                 700,353
       With            --------------------------------------------------------
                       8     SHARED DISPOSITIVE POWER

                             -0-
-------------------------------------------------------------------------------
    9      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           700,353
-------------------------------------------------------------------------------
   10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

           N/A
-------------------------------------------------------------------------------
   11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

           4.639%
-------------------------------------------------------------------------------
   12      TYPE OF REPORTING PERSON*

           IA
-------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!
                                PAGE 4 OF 11 PAGES





----------------------                                    ---------------------
CUSIP No. 726079106                 13G                   Page  5  of  11 Pages
----------------------                                    ---------------------

-------------------------------------------------------------------------------
        
    1      NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only).

           John Hancock Advisers, LLC

-------------------------------------------------------------------------------
    2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*      (a)  |_|
                                                                  (b)  |_|
           N/A
-------------------------------------------------------------------------------
    3      SEC USE ONLY

-------------------------------------------------------------------------------
    4      CITIZENSHIP OR PLACE OF ORGANIZATION

           Delaware
-------------------------------------------------------------------------------
                       5     SOLE VOTING POWER

                             -0-
                       --------------------------------------------------------
    Number of          6     SHARED VOTING POWER
      Shares
   Beneficially              181,000
     Owned by          --------------------------------------------------------
       Each            7     SOLE DISPOSITIVE POWER
    Reporting
      Person                 -0-
       With            --------------------------------------------------------
                       8     SHARED DISPOSITIVE POWER

                             54,000
-------------------------------------------------------------------------------
    9      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           181,000
-------------------------------------------------------------------------------
   10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

           N/A
-------------------------------------------------------------------------------
   11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

           1.199%
-------------------------------------------------------------------------------
   12      TYPE OF REPORTING PERSON*

           IA
-------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!
                               PAGE 5 OF 11 PAGES





----------------------                                    ---------------------
CUSIP No. 726079106                 13G                   Page  6  of  11 Pages
----------------------                                    ---------------------

-------------------------------------------------------------------------------
        
    1      NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only).

           Sovereign Asset Management LLC

-------------------------------------------------------------------------------
    2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*      (a)  |_|
                                                                  (b)  |_|
           N/A
-------------------------------------------------------------------------------
    3      SEC USE ONLY

-------------------------------------------------------------------------------
    4      CITIZENSHIP OR PLACE OF ORGANIZATION

           Delaware
-------------------------------------------------------------------------------
                       5     SOLE VOTING POWER

                             -0-
                       --------------------------------------------------------
    Number of          6     SHARED VOTING POWER
      Shares
   Beneficially              54,000
     Owned by          --------------------------------------------------------
       Each            7     SOLE DISPOSITIVE POWER
    Reporting
      Person                 -0-
       With            --------------------------------------------------------
                       8     SHARED DISPOSITIVE POWER

                             54,000
-------------------------------------------------------------------------------
    9      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           54,000
-------------------------------------------------------------------------------
   10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

           N/A
-------------------------------------------------------------------------------
   11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

           .358%
-------------------------------------------------------------------------------
   12      TYPE OF REPORTING PERSON*

           IA
-------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!
                               PAGE 6 OF 11 PAGES



    This  amendment  is being  filed  pursuant  to Rule  13d-2 as the  aggregate
holdings  of all  reporting  persons  have  decreased  by  more  than  5% of the
outstanding shares of the Issuer.

    This  Amendment No. 2 to Schedule 13G also amends the initial  Schedule 13G,
and the  Amendment  No. 1 thereto,  relating  to the Common  Stock of the Issuer
filed with the  Securities  and  Exchange  Commission  on  September 7, 2005 and
February 8, 2006, respectively,  primarily to correct double counting of shares.
As a result of such  double  counting,  the initial  filing on Schedule  13G was
erroneously  made on September 7, 2005 (at which time the aggregate  holdings of
all reporting persons did not exceed 10% of the outstanding  shares) rather than
by December 10, 2006, as the first month end at which the holdings  exceeded 10%
was November 30, 2005.

Attention:  Intentional  misstatements  or omissions of fact constitute  Federal
criminal violations (See 18 U.S.C. 1001)

   Item 1(a)    Name of Issuer:
                Placer Sierra Bancshares

   Item 1(b)    Address of Issuer's Principal Executive Offices:
                525 J Street
                Sacramento California 95814

   Item 2(a)    Name of Person Filing:
                This filing is made on behalf of Manulife Financial  Corporation
                ("MFC"),  and MFC's  indirect,  wholly-owned  subsidiaries,  MFC
                Global  Investment  Management  (U.S.A.) Limited ("MFC Global"),
                Independence  Investments,  LLC ("IIA"),  John Hancock Advisers,
                LLC ("JHA") and Sovereign  Asset  Management  LLC ("SAM").

   Item 2(b)    Address of the Principal Offices:
                The principal business offices of MFC and MFC Global are located
                at 200 Bloor Street,  East, Toronto,  Ontario,  Canada, M4W 1E5;
                IIA is  located at 53 State  Street,  Boston,  MA 02109;  JHA is
                located at 601 Congress Street, Boston, Massachusetts 02210; SAM
                is located at 101 Huntington Avenue, Boston, Massachusetts.  IIA
                ceased being a subsidiary of MFC following the close of business
                on May 31, 2006.

   Item 2(c)    Citizenship:
                MFC and MFC Global  are  organized  and exist  under the laws of
                Canada.
                IIA, JHA and SAM are  organized  and exist under the laws of the
                State of Delaware.

   Item 2(d)    Title of Class of Securities:
                Common Stock

   Item 2(e)    CUSIP Number:
                726079106

   Item 3       If the Statement is being filed  pursuant to Rule  13d-1(b),  or
                13d-2(b), check whether the person filing is a:

                MFC:        (g) (X) Parent Holding Company, in accordance with
                                    ss.240.13d-1(b)(ii)(G).

                MFC Global: (e) (X) Investment Adviser registered under ss.203
                                    of the Investment Advisers Act of 1940.


                               PAGE 7 OF 11 PAGES



                IIA:        (e) (X) Investment Adviser registered under ss.203
                                    of the Investment Advisers Act of 1940.

                JHA:        (e) (X) Investment Adviser registered under ss.203
                                    of the Investment Advisers Act of 1940.

                SAM:        (e) (X) Investment Adviser registered under ss.203
                                    of the Investment Advisers Act of 1940.

   Item 4       Ownership:

                (a)  Amount  Beneficially  Owned:  MFC  Global  has  beneficial
                     ownership  of  787  shares  of  Common   Stock,   IIA  has
                     beneficial  ownership  of 700,353  shares of Common  Stock
                     (including  127,000  shares  held by IIA with  respect  to
                     which JHA has shared  voting and  investment  discretion),
                     JHA has  beneficial  ownership of 181,000 shares of Common
                     Stock  (including  127,000 shares held by IIA with respect
                     to which JHA has shared voting and  investment  discretion
                     and  54,000  shares  for which SAM has  shared  voting and
                     investment discretion) and SAM has beneficial ownership of
                     54,000    shares   of   Common    Stock.    Through    its
                     parent-subsidiary relationship to MFC Global, IIA, JHA and
                     SAM,  MFC may be deemed to have  beneficial  ownership  of
                     these same shares.


                (b)  Percent of Class: Of the 15,096,778 shares outstanding
                     as of May 5, 2006, according to the issuer's quarterly
                     report on form  10-Q for the  period  ended  March 31,
                     2006, MFC Global held .005%, IIA held 4.639%, JHA held
                     1.199% and SAM held .358%.  The  aggregate  percentage
                     held  as of May 31,  2006  (after  eliminating  double
                     counting  as a result of shared  investment  or voting
                     discretion) by all reporting persons was 5.002%.

                     The  Schedule  13-G  filing on  September  7, 2005 and the
                     Schedule  13-G  amendment  filed on February  14, 2006 are
                     corrected as follows:

                     Of the  14,993,473  shares  outstanding  as of October 25,
                     2005  according to the issuer's  quarterly  report on Form
                     10-Q  for  the  period  ended   September  30,  2005,  the
                     aggregate  percentage held by all of the reporting persons
                     (after  eliminating  double counting as a result of shared
                     voting)  was  10.995%  as  of  December  31,  2005.  After
                     eliminating  double  counting,  the percent held by all of
                     the  reporting  persons as of August 31, 2005 was 8.36% so
                     the  initial  Schedule  13G  should not have been filed at
                     that time but by December  10,  2005,  as on November  30,
                     2006 the holdings were 10.125%,  which was the first month
                     end at which the holdings exceeded 10%.

                (c)  Number of shares as to which the person has:

As of May 31, 2006



                                                                    
------------------- ------------------- ------------------- ------------------- -------------------
Holder              Sole Voting         Shared Voting       Sole Dispositive    Shared Dispositive
------------------- ------------------- ------------------- ------------------- -------------------
MFC                 0                   0                   0                   0
------------------- ------------------- ------------------- ------------------- -------------------
MFC Global          787                 0                   787                 0
------------------- ------------------- ------------------- ------------------- -------------------
IIA                 573,353             127,000             700,353             0
------------------- ------------------- ------------------- ------------------- -------------------
JHA                 0                   181,000             0                   54,000
------------------- ------------------- ------------------- ------------------- -------------------
SAM                 0                   54,000              0                   54,000
------------------- ------------------- ------------------- ------------------- -------------------


                          PAGE 8 OF 11 PAGES


The Schedule 13-G filing on September 7, 2005 is corrected as follows:

As of August 31, 2005



                                                                    
------------------- ------------------- ------------------- ------------------- -------------------
Holder              Sole Voting         Shared Voting       Sole Dispositive    Shared Dispositive
------------------- ------------------- ------------------- ------------------- -------------------
MFC                 0                   0                   0                   0
------------------- ------------------- ------------------- ------------------- -------------------
MFC Global          498                 0                   498                 0
------------------- ------------------- ------------------- ------------------- -------------------
IIA                 931,000             265,500             1,196,500           0
------------------- ------------------- ------------------- ------------------- -------------------
JHA                 54,000              265,500             54,000              0
------------------- ------------------- ------------------- ------------------- -------------------
SAM                 0                   0                   0                   0
------------------- ------------------- ------------------- ------------------- -------------------


The Schedule 13-G amendment filed on February 14, 2006 is corrected as follows:

As of December 31, 2005



                                                                    
------------------- ------------------- ------------------- ------------------- -------------------
Holder              Sole Voting         Shared Voting       Sole Dispositive    Shared Dispositive
------------------- ------------------- ------------------- ------------------- -------------------
MFC                 0                   0                   0                   0
------------------- ------------------- ------------------- ------------------- -------------------
MFC Global          787                 0                   787                 0
------------------- ------------------- ------------------- ------------------- -------------------
IIA                 1,335,100           258,700             1,593,800           0
------------------- ------------------- ------------------- ------------------- -------------------
JHA                 54,000              258,700             54,000              0
------------------- ------------------- ------------------- ------------------- -------------------
SAM                 0                   0                   0                   0
------------------- ------------------- ------------------- ------------------- -------------------


   Item 5       Ownership of Five Percent or Less of a Class:

                If this  statement  is being filed to report the fact that as of
                the date  hereof  the  reporting  person  has  ceased  to be the
                beneficial  owner of more  than  five  percent  of the  class of
                securities, check the following (X).

                Following  the sale of  Independence  Investment  LLC  after the
                close of  business  on May 31,  2006,  the  aggregate  number of
                shares beneficially owned by Manulife Financial  Corporation and
                its  remaining  subsidiaries  dropped  to  less  than  3% of the
                Issuer's outstanding shares.

   Item 6       Ownership of More than Five Percent on Behalf of Another Person:
                Not applicable.

   Item 7       Identification   and  Classification  of  the  Subsidiary  which
                Acquired the Security  Being  Reported on by the Parent  Holding
                Company:
                See Items 3 and 4 above.

   Item 8       Identification and Classification of Members of the Group:
                Not applicable.

   Item 9       Notice of Dissolution of a Group:
                Not applicable.

   Item 10      Certification:
                By signing below the undersigned  certifies that, to the best of
                its knowledge and belief, the securities  referred to above were
                acquired  and are held in the  ordinary  course of business  and
                were not  acquired  and are not held for the  purpose of or with
                the effect of changing or influencing  the control of the issuer
                of the  securities  and  were not  acquired  and are not held in
                connection  with or as a participant in any  transaction  having
                that purpose or effect.


                          PAGE 9 OF 11 PAGES



                                    SIGNATURE

     After reasonable inquiry and to the best of its knowledge and belief,  each
of the undersigned certifies that the information set forth in this statement is
true, complete and correct.

                            Manulife Financial Corporation

                            By:      /s/ Angela Shaffer
                            Name:    Angela Shaffer
Dated:  June 09, 2006       Title:   Vice President and Corporate Secretary

                            MFC Global Investment Management (U.S.A.) Limited

                            By:      /s/ Norman Light
                            Name:    Norman Light
Dated:  June 09, 2006       Title:   Chief Financial Officer

                            Independence Investments, LLC

                            By:      /s/ Patricia Thompson
                            Name:    Patricia Thompson
Dated:  June 09, 2006       Title:   Chief Compliance Officer

                            John Hancock Advisers, LLC

                            By:      /s/ Al Ouellette
                            Name:    Al Ouellette
Dated:  June 09, 2006       Title:   Assistant Vice President and Senior Counsel

                            Sovereign Asset Management LLC

                            By:      /s/ Al Ouellette
                            Name:    Al Ouellette
Dated:  June 09, 2006       Title:   Assistant Vice President and Senior Counsel



                               PAGE 10 OF 11 PAGES


                                    EXHIBIT A
                             JOINT FILING AGREEMENT

     Manulife Financial  Corporation,  MFC Global Investment Management (U.S.A.)
Limited, Independence Investments, LLC, John Hancock Advisers, LLC and Sovereign
Asset Management LLC agree that the Schedule 13G (Amendment No. 2) to which this
Agreement is attached,  relating to the Common Stock of Placer Sierra Bancshares
is filed on behalf of each of them.

                            Manulife Financial Corporation
                            By:      /s/ Angela Shaffer
                            Name:    Angela Shaffer
Dated:  June 09, 2006       Title:   Vice President and Corporate Secretary

                            MFC Global Investment Management (U.S.A.) Limited
                            By:      /s/ Norman Light
                            Name:    Norman Light
Dated:  June 09, 2006       Title:   Chief Financial Officer

                            Independence Investments, LLC
                            By:      /s/ Patricia Thompson
                            Name:    Patricia Thompson
Dated:  June 09, 2006       Title:   Chief Compliance Officer

                            John Hancock Advisers, LLC
                            By:      /s/ Al Ouellette
                            Name:    Al Ouellette
Dated:  June 09, 2006       Title:   Assistant Vice President and Senior Counsel

                            Sovereign Asset Management LLC
                            By:      /s/ Al Ouellette
                            Name:    Al Ouellette
Dated:  June 09, 2006       Title:   Assistant Vice President and Senior Counsel




                               PAGE 11 OF 11 PAGES