Comment 15 for bug 96430

Go back to 9631 is a bad idea, because the new nVidia cards (8000) only work with the new 9755 driver. So updating was the right decision.

The problem is, that now 3 trees of nvidia-drivers are available:

97xx - for newer cards (at the moment in nvidia-glx)
96xx - for cards in the "middleage" (no driver available in ubuntu)
71xx - for "historic" cards (at the moment in nvidia-legacy-glx). This driver provides 3d but no support for compiz/beryl.

So the developers have to maintain 3 versions of nvidia-drivers. More work to do. Nevertheless I hope, that all 3 versions will be provided with Ubuntu.