Hi,
this isn't actually a support question but in the absence of a bug section...
When I render a scene (Renderers -> Render Image), and open another scene or just click on File -> New while in the rendering progress, the program crashes.
Happend on a Core 2 Duo, 8 GB Ram and Windows 7 64 Bit, but I guess it is just a bug and not hardware or OS dependent.
If it has been mentioned already, ignore this topic.
(did a search but found nothing).
Hope I could help a little.