I try several times more different ways to reproduce the crash but without success.Each time program exited normally - see attachment
** Attachment added: "Backtrace" http://librarian.launchpad.net/5048949/gdb-gnome-screenshot.txt -- gnome-panel-screenshot crash https://launchpad.net/bugs/71224 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
