I just thought I'd note hear that newer versions of Steam crash on start with newer Linux versions of Wine when running the ALSA sound driver. This upstream bug affects the 13.1.x versions of Crossover.
A workaround is to manually set the audio driver to OSS, or to use Pulse Audio and the Pulse driver (Contrary to popular belief pulse-audio does not have to be installed systemwide. It's just that such setups are popular.) If someone wants to make a guide on how to do each of these, it would be helpful.
I may go and look it up later.
Using the OSS driver involves a Wine registry key to force-override auto-detection. However, I would need to look up what that key is.