Thank you for your bug. Could you get a backtrace with metacity-dbgsym
(https://wiki.ubuntu.com/DebuggingProgramCrash) installed?
** Changed in: metacity (Ubuntu)
Importance: Undecided => Medium
Assignee: (unassigned) => Ubuntu Desktop Bugs
Status: Unconfirmed => Needs Info
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another metacity crash
https://launchpad.net/bugs/83646