While working on the braintrainer hardware it’s quite easy to screw up the gnome session. So here is a quick howto to restore a screwed up gnome almost to it’s default configuration without having to remove or add a user. Ditch the hidden gnome user pref folders in your home directory.
When you log back into Gnome a new default set will be re-created.
The folders to remove are: .gconf, .gconfd, .gnome, .gnome2, .gnome2_private