Comment 3 for bug 90274

I'm seeing the problem on both Jaunty and Karmic.

Steps to reproduce: install libgimp-perl, pdl and dependancies

$ sudo apt-get install libgimp-perl

open a terminal and start gimp, then in gimp create a new image.
in gimp, click on Filters>>Enhance>>2x2 Contrast Enhance

dude@karmic-koala:~$ uname -a
Linux karmic-koala 2.6.31-19-generic #56-Ubuntu SMP Thu Jan 28 01:26:53 UTC 2010 i686 GNU/Linux
dude@karmic-koala:~$ gimp --version
GNU Image Manipulation Program version 2.6.7

dude@karmic-koala:~$ dpkg -l|grep pdl
ii pdl 1:2.4.3-8ubuntu1 perl data language: Perl extensions for nume
dude@karmic-koala:~$ dpkg -l|grep libgimp-perl
ii libgimp-perl 2.0.dfsg+2.2pre1.dfsg-5 Perl support and plugins for The GIMP
dude@karmic-koala:~$ gimp

Results:

GIMP-Error: Calling error for procedure 'gimp-procedural-db-proc-info':
Procedure 'gimp--gimp-append-data' not found

GIMP: Calling error for procedure 'gimp-procedural-db-proc-info':
Procedure 'width' not found

GIMP: Calling error for procedure 'gimp-procedural-db-proc-info':
Procedure 'height' not found

GIMP: Calling error for procedure 'gimp-procedural-db-proc-info':
Procedure 'init' not found

GIMP: Calling error for procedure 'gimp-procedural-db-proc-info':
Procedure 'x' not found

GIMP: Calling error for procedure 'gimp-procedural-db-proc-info':
Procedure 'y' not found

GIMP: Calling error for procedure 'gimp-procedural-db-proc-info':
Procedure 'w' not found

GIMP: Calling error for procedure 'gimp-procedural-db-proc-info':
Procedure 'h' not found

GIMP: Calling error for procedure 'gimp-procedural-db-proc-info':
Procedure 'get-rect' not found

GIMP: Calling error for procedure 'gimp-procedural-db-proc-info':
Procedure 'data' not found

GIMP: Calling error for procedure 'gimp-procedural-db-proc-info':
Procedure 'merge-shadow' not found

GIMP: Calling error for procedure 'gimp-procedural-db-proc-info':
Procedure 'update' not found