Comment 9 for bug 505995

Okay, well in general this type of error just means the client application wasn't using the X11 protocol properly, or didn't account for some exceptional situation. At this point it looks more likely that this is the case, than that there's an error in libx11, so I'm closing out this task at this time. If more evidence comes to light pointing to an issue in libx11, reopen the libx11 bugtask with the details.