I'm a 3D Vision user who has had issues with partial driver installations causing wierd errors (graphical glitches, colours, 3D incompatibility in some modes, etc).
I think I am currently running 296, but the suggestions posted were things anyone should try before anything else.
If you are referring to 'hide stereoscopic 3d effects when game starts' - I have this option in 296. Never tried it though - what does it do?
Generally speaking, the older version of the Nvidia drivers have better compatibility with older stuff. For example, I think up to 285 allows you to use the generic monitor mode, so you can use 3D Vision with CRTs, unsupported projectors, Emagin Z800, etc. Later on, Nvidia removed this feature
. When the Rift comes out, I think I might abandon Nvidia altogether.