Why am I unable to install the Nvidia 96 driver?
I have a old Nvidia card that needs the nvidia 96 driver to enable all the fancy compiz effects (the noveau free driver doesn't work). I tried installing it with Ubuntu Software Center but it said that it had dependency problems.
As long this is an open bug, you can try the open-source driver Nouveau. To enable the experimental 3D support for this driver, you need to install the package libgl1-mesa-dri-experimental.
Although it says experimental and is still unsupported by upstream developers, that driver works pretty well on a lot of Nvidia cards.