I've been playing with 3.03.4 - 10.6 demo for OSX and I'm experiencing Blender crashes when trying run preview in some projects created in V2:
http://pastebin.com/XYjQ8sBY
It even happens when I create new empty scene in the same file hitting CTRL+Z immediatly crashes blender. This does not happen when I'm creating new file.
I can't provide those files – NDA