Hi,

   I've been able to reproduce the problem on my machine 

   my versions :

  koen@koen-desktop:/var/crash$ dpkg -l | grep office
ii  openoffice.org                             1:2.3.0-1ubuntu5.3                                OpenOffice.org Office suite
ii  openoffice.org-base                        1:2.3.0-1ubuntu5.3                                OpenOffice.org office suite - database
ii  openoffice.org-calc                        1:2.3.0-1ubuntu5.3                                OpenOffice.org office suite - spreadsheet
ii  openoffice.org-common                      1:2.3.0-1ubuntu5.3                                OpenOffice.org office suite architecture ind
ii  openoffice.org-core                        1:2.3.0-1ubuntu5.3                                OpenOffice.org office suite architecture dep
ii  openoffice.org-draw                        1:2.3.0-1ubuntu5.3                                OpenOffice.org office suite - drawing
ii  openoffice.org-evolution                   1:2.3.0-1ubuntu5.3                                Evolution Addressbook support for OpenOffice
ii  openoffice.org-gnome                       1:2.3.0-1ubuntu5.3                                GNOME Integration for OpenOffice.org (VFS, G
ii  openoffice.org-gtk                         1:2.3.0-1ubuntu5.3                                GTK Integration for OpenOffice.org (Widgets,
ii  openoffice.org-help-en-us                  1:2.3.0-1ubuntu2                                  English_american help for OpenOffice.org
ii  openoffice.org-hyphenation                 0.2                                               Hyphenation patterns for OpenOffice.org
ii  openoffice.org-impress                     1:2.3.0-1ubuntu5.3                                OpenOffice.org office suite - presentation
ii  openoffice.org-java-common                 1:2.3.0-1ubuntu5.3                                OpenOffice.org office suite Java support arc
ii  openoffice.org-l10n-common                 1:2.3.0-1ubuntu2                                  common files for OpenOffice.org language and
ii  openoffice.org-l10n-en-gb                  1:2.3.0-1ubuntu2                                  English_british language package for OpenOff
ii  openoffice.org-l10n-en-za                  1:2.3.0-1ubuntu2                                  English_southafrican language package for Op
ii  openoffice.org-math                        1:2.3.0-1ubuntu5.3                                OpenOffice.org office suite - equation edito
ii  openoffice.org-style-human                 1:2.3.0-1ubuntu5.3                                Human symbol style for OpenOffice.org
ii  openoffice.org-thesaurus-en-us             1:2.2.0-2ubuntu1                                  English Thesaurus for OpenOffice.org
ii  openoffice.org-writer                      1:2.3.0-1ubuntu5.3                                OpenOffice.org office suite - word processor

gutsy amd64 :  2.6.22-14-generic #1 SMP Thu Jan 31 23:33:13 UTC 2008 x86_64 GNU/Linux

I attach a screencast with the problem and I'll try to upload the crashfile that was produced

I'm also using the human theme and have no visual effects activated

It seems to systematically crash when I try to add a fourth color (the first three ones work OK)

When I launch ooffice --writer from a terminal it also crashes but it does not produce any terminal output when it does

there are some lines that are added to the .xsession-errors file though : 

Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x3c00061 (OpenOffice)
Window manager warning: meta_window_activate called by a pager with a 0 timestamp; the pager needs to be fixed.

I only have 1 crash file in /var/crash while I managed to crash it several times