Comment 9 for bug 371585

Alexandre:
I moved the whole .gconf to get a new fresh one. And it has worked after log-out/log-in, reboot, log-out, log-in.
(You will lose window-settings / themes / saved networks etc, but I couldn't bother tracking down the exact problem).

This is just a guess, but it seems like you are moving something that is within a "session", which sounds to me is something that gets generated during boot-up and/or when you log-in, meaning that the problem is elsewhere in gconf that actually generates this incorrect config.
   Again, this is just a guess based on the path to required_components, I haven't had a look.