Starting my 64-bit build of openoffice from command line, I noticed this error: /usr/lib64/openoffice/program/openintro_gentoo.bmp: Just 24 bpp bitmaps are supported. Checked the directory and the file was missing, so I extracted it from the binary package. So the file is built/installed, but not moved in during the merge. The error continued to occur. Used convert (ImageMagick) to reduce image depth to 24 bpp, and now openintro_gentoo.bmp loads, and the Gentoo specific splash appears on OOo startup. Flags for openoffice build: USE="binfilter branding cairo cups dbus firefox gstreamer gtk java kde odk pam sound webdav -debug -eds -gnome -ldap -mono -seamonkey"
I found that ooo-build-2.2.0.1.tar.gz (and all other ooo-builds used to build ooo-2.2) contains wrong 32bpp openintro_gentoo.bmp. All other splashes are 24bpp...
I've fixed this upstream now, so this problem will vanish, when we update to the next patch-release. Thanks for reporting