I left Oolite paused while watching a movie and came back to this:
***** Encountered localException during initialisation in [Universe update:] : NSInvalidArgumentException : Tried to add nil key to dictionary *****
2006-03-05 10:58:23.000 oolite *** NSTimer ignoring exception 'NSInvalidArgumentException' (reason 'Tried to add nil key to dictionary') raised during posting of timer with target 0x82f5a08 and selector 'pollControls:'
Fatal signal: Segmentation Fault (SDL Parachute Deployed)
I'm running the latest development release on Linux.