Wow, I haven't encountered that before. My Linux-Fu is pretty weak, but I'll look into it to the best of my ability. The game is meant to be played at 16:9, and the UI scales to that. Are you trying to play at half width on purpose, or was this the result of attempting to change resolutions to say, 1280x720?
What was the context of the crash? There have been reported issues with some combat encounters in corridors, which has been worked out for the next version. I've also been tracking a very strange seemingly random crash with large save files too.