[Nouveau] Virtualbox 3D accel broken in xf86-video-nouveau 1.0.3

[Pouar]

there's a regression in the xf86-video-nouveau driver that came up in 
1.0.3 that causes the desktop to bounce around in virtualbox whenever 
using HW acceleration in cinnamon and gnome 3, but not in fallback or 
cinnamon 2d, only happens in virtualbox and not the host, I've confirmed 
it was the graphics driver on the host because it happened with the 
1.0.3 driver but not the 1.0.2.
anyone else having this problem? I'm using GeForce GTX 560 Ti
-- 
Pouar
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