im having almost the same problem, i accidentally moved my main panel to
to right side, and now the system crashes every time i try to move it
back to the top
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main toolbar panel crashes when trying to apply a background
https://bugs.launchpad.net/bugs/115885
You received this bug
As described in the previous comments, your report lacks the information
we need to investigate the problem further. We'll close this report for
now - please reopen it if you can give us the missing information.
** Changed in: gnome-panel (Ubuntu)
Status: Incomplete = Invalid
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main
Thanks for your bug report. Please try to obtain a backtrace
http://wiki.ubuntu.com/DebuggingProgramCrash and attach the file to the
bug report. This will greatly help us in tracking down your problem.
** Changed in: gnome-panel (Ubuntu)
Importance: Undecided = Medium
Assignee: