Comment 18 for bug 902043

additional information:

I run (server-start) from .emacs. This is pretty reproducible, happens most times I minimize emacs, even if it is freshly opened and only has the scratch buffer up. One of the times it happens, I believe I saw something like 'xf86wakeup undefined' in the minibuffer (not sure if thats related). If it hit the close button on the window frame, emacs will close cleanly (and even pop up a dialog asking if I want to save my buffers).

Let me know if there is more I can do to diagnose.