Just started happening to me as well, adding this comment because it only began after I installed Rubyripper.
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is a bug assignee. https://bugs.launchpad.net/bugs/482680 Title: System Monitor won't close through normal methods, I have to kill the process. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
