Comment 3 for bug 878627

Stack trace? I'm not sure what kind of stack trace you would be looking for, as it's not a crash or a hang or anything. It's just that Unity gets confused about the state of Firefox's window, but otherwise continues running fine. Closing the Firefox window sometimes gets it to work properly again. Stack traces at this point would probably be useless as they would just show Compiz in its normal mode of operation.