I think you might want to read this:
http://ubuntuforums.org/showthread.php?p=3664438
I can also confirm this bug. Just picking the generic kernel instead of
i386 triggers it. It also happens with linux-rt.
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[gutsy] Gnome settings daemon does randomly not work
https://bugs.launchpad.net/bugs/1
Oh, i have seen this since Edgy Eft Beta; just by pluging my digital
photo camera, importing a couple of pics and then turning off the camera
triggers it. To fix, i simply kill the nautilus process and remember
next time when importing pictures not to turn off the camera but wait
whatever timeout e