Tomb Raider received a PC patch this weekend, with fixes for the Nvidia-associated stability issues high on the agenda. The patch notes mention fixes for "some stability and startup issues on machines that have both Intel and Nvidia graphics hardware" and "some small improvements to TressFX hair rendering," these the chief issues which led to Nvidia apologizing for the game's unstable performance on its GeForce cards at max settings

Going by the Steam and Eidos forums, the patch does provide significant improvement for some of the stability issues, although by the sounds of it TressFX is still somewhat flaky.