NVIDIA has just officially published a new set of WHQL-certified graphics drivers for all GeForce 6, 7, 8, 9, 100, and 200-series desktop GPUs and ION GPUs. This WHQL version follows the 186.08 BETA released few days ago. ForceWare 186.18 comes with PhysX v9.09.0428 runtimes and supports OpenGL 3.0. For the support of OpenGL 3.1, try the ForceWare 190.15.
From the release notes, a bug related to PhysX and Multi-GPU (SLI) has been fixed (the PhysX option is disabled by default after driver installation).