I don't know if this is the right place to report this but I have had also problems with the ubuntu upgrade using an old Nvidia Geforce 440 Go card. I installed the old nvidia-glx-96 using the 2.6.31-17-386, but the modules didn't compile. So, I tried the 2.6.31-17-generic kernel and it works. Maybe with a new nvidia-glx would also work but i didn't try
I don't know if this is the right place to report this but I have had also problems with the ubuntu upgrade using an old Nvidia Geforce 440 Go card. I installed the old nvidia-glx-96 using the 2.6.31-17-386, but the modules didn't compile. So, I tried the 2.6.31-17-generic kernel and it works. Maybe with a new nvidia-glx would also work but i didn't try