I recently messed up my Gnome Panels by accidentally deleting the shutdown and Time applets .
So I found a way to Restore them to the default state.
Now the best way to do this is to do it via terminal
Then Type the Following
(Note:Don’t leave any space between the 2 dashes)
gconftool – -recursive-unset /apps/panel
Now all the panels Should disappear.
Then type the following to restore them to their default state
rm -rf ~/.gconf/apps/panel
Finally Execute the following to show all the panels .
I tested this on Maverick Meerkat (10.10) and it works fine , but it should work on all versions from Gutsy Gibbon (7.10) onwards .