Gnome panel doesn't respond

[Richard Lupton <r.lupton@gmail.com>]

Hello,

I have Gnome 2.8 installed on Debain testing, which was working fine
until recently. However, now gnome-panel is broken - it just doesn't
respond. It can be restarted, and then it notices changes to themes
etc., but when running it doesn't do anything.
I've tried adding a new user to the system, in which the panel works
fine, so I assume it's something to do with my personal config. So I
tried moving various Gnomey-sounding config folders out of the way from
my home directory, but that didn't help.

Thanks,
    Richard