Problem with Blender in Hardy

[Irene Coremberg]

Hello:
Recently I've migrated to Ubuntu Studio 8.04, and had some trouble with 
Blender:

1- Blender works with two modes: Windowed and fullscreen, but both two 
works as fullscreen.
2- When I try to get a Render (F12), the program crashes.

Since last month, I used it on Ubuntu Studio 7.10 and it worked very well.

Any suggestions?

Thanks a lot

Irene C.