[Bug 73168] Crashed when opening dialogue box (similar problem)?

[Jeffrey McCloskey]

I was on myspace.com, had received a friend request, and chose to deny
it.  I clicked on the checkbox to select the person, hit the Deny
Selected button, and a message box was supposed to pop up asking me if I
really wanted to do that, giving the option to select yes or no.

The message box/window popped up largely transparent, with no text
visible.  When I tried to click on the message box, Firefox exited
without notice and I received the box letting me report a bug.

** Attachment added: "The crash report, complete, all 16.6 meg of it"
   http://librarian.launchpad.net/6838708/_usr_lib_firefox_firefox-bin.1000.crash

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Crashed when opening new window
https://launchpad.net/bugs/73168