menu panel position bug

[Chris Hippchen <christoph penn com>]

This morning when i logged in I was shocked to find my menu panel in the
middle of the screen, off center.  Attached is a screen shot.  I have no
idea what caused this,.  Removing the panel and then adding a menu panel
does not put it where it belongs.  How can I fix this? (other than
deleting my .gnome directory, I'd rather live without the menu panel)