hi campbell barton actually i don't have project now or blend file i was searching in blender for bugs to report it to you because i like this software and you can try the steps ..use skin modifier.... and in edit mode try to create uv sphere and you well find blender crashing ... and some of members in my group told me the same problem that mean the problem is bug in blender not from the project...and i will help you with searching for any bugs.