Pressing buttons on orbiter while game play causes orbiter to crash 10 seconds later.
This one was a toughie, and had to do with code that made sure that the current window was always grabbed. The solution is to employ a default window handler that sets a re-send flag, and use an alarm handler to catch this flag (because X11 error handlers short circuit their callers), and subsequently try to re-acquire window and resend the event.