Black screen when launching Gnome

[Jean Arnaud <Jean.Arnaud@inrialpes.fr>]

Hi !

I did a netinstall yesterday of Etch testing Amd64 version, and it works 
properly, but when Gnome is starting i get an empty black screen, and i 
can't do anything.
Is it a know issue ?
(I got an AMD3200+ and a GeForce 7600 GT)

Thanks

--
-- Jean Arnaud