Changes to $HOME for gnome 3

[dabicho <tsukebumi gmail com>]

Hello.
I am trying out gnome 3, however I cannot change desktop background
for a particular user.
If I add a new user, it can change it's background without problems.
I tried removing configuration directories from $HOME to no avail. So
where are configurations stored?
Or is there something I have to do with gconf? I am at a loss there.

Does anybody have an idea?

Thank you.