I'm affected by that problem and that "force" to use the default gnome theme.
My video card is: Intel 82855GME
And now my xorg.conf below:
** Attachment added: "xorg.conf"
http://launchpadlibrarian.net/12347334/xorg.conf
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gnome-settings-daemon crashed with SIGSEGV
https://bugs.launchpad.n
Tested bug's workaround and disabling xrandr pluggin does
gnome_setting_deamon stop crashing.
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gnome-settings-daemon crashed with SIGSEGV
https://bugs.launchpad.net/bugs/197153
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Tested on fresh Kubuntu 10.10 install, video in fullscreen no longer
quit that mode. When I change volume with my keyboard, I get some kind
of tearings / screen glitches, but disapear as soon that volume OSD is
gone.
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[MASTER] Volume/brightness/eject key briefly changes window focus (e.g. makes