A couple of months ago, I merrily installed (from scratch, not an update) Quantal 12.10 64bit after having run 12.04.2 LTS just fine with my GeForce GTX 550Ti.
Big mistake. Nothing ran properly and it was all hellish.
Have the Nvidia bugs been squashed since then? If I installed it now (with nomodeset?) will it all be OK and I can run Unity 3D and stuff?
I know I should just find out for myself, but it was such as screaming pain in the foreskin last time that I thought I'd just see if anyone else has been there first.