There is an NVIDIA Solaris Driver web forum. You can access it by going to http://devtalk.nvidia.com and following the "Solaris" link in the “GPU Unix Graphics” section. This is the preferable tool for seeking help; users can post questions, answer other users' questions, and search the archives of previous postings.
If all else fails, you can contact Oracle for support at http://support.oracle.com, or your local service provider.
NVIDIA provides a technical contact for information about
potential security issues. Anyone who has identified what they
believe to be a security issue with an NVIDIA UNIX driver is
encouraged to directly contact the NVIDIA UNIX Graphics Driver
security email alias,
to report and evaluate any potential issues prior to publishing a
public security advisory.