Gnome Shell broken in one user account, works in other

[Andreas Wallberg <andreas wallberg gmail com>]

Hi all!

I've been trying out Gnome Shell in Fedora 14 on my Thinkpad and I
have to say I am very very impressed. It looks promising indeed.
Unfortunately, probably after a crash (I have had some problem with GS
+ the free ATI driver), I can no longer activate "Activities" on my
normal user account, neither using the top left corner or via the key
binding. However, it works just fine on a fresh user account. I
suspect that some configuration file has gone bad in the crash and
would like to clear all files and settings related to the Shell. My
question is, what needs to be deleted to start over from scratch?

Best regards,
Andreas