this is a very specific problem and it happens every time. 100% of the time. Everything seems to work just fine, but if I open User Preferences and close it blender will crash. This doesn’t make Blender unusable, but it is very annoying. Esp. when you download a new build and have to set up all your stuff and it crashes every time you do it. Despite it crashing it does save the settings I choose, so eventually I will not need to open user pref and this will be a non issue. Did I mention this is really annoying?
Win 7 64bit
GTX 650 ti 1 gig
Blender 2.70 and 71 (problem appeared after the 2.7 build was installed)