I think I have an other bug :
I have two guests (Ubuntu 8.10 and Windows Server 2003 SP2) on a Vista SP1 host. When I activating the 3D acceleration on the two guests, I can't run the two guest at the same time. One of them don't start like in this screenshots :
http://www.erkan.power-heberg.com/files ... _acel1.jpg
Here the log of the guest not starting :
http://www.erkan.power-heberg.com/files ... _acel2.jpg
Before reporting a bug I would know if other people have the same problems.