After NVIDIA's 337 Linux driver series has already been in beta with the major new feature being Fermi/Kepler/Maxwell overclocking support, the latest beta has now been released.

The NVIDIA 337.19 Beta was released today and it features a bug-fix for HDMI at 4K resolutions in certain configurations, nvidia-settings command-line controls for over/under-clocking support, several cosmetic fixes for the NVIDIA Settings GUI for clock controls, support for the GLX_EXT_stereo_tree extension in certain configurations, and Unified Back Buffer (UBB) and 3D Stereo support with the composite extension for Quadro graphics cards.

More details on these latest NVIDIA 337 series Linux driver changes can be found via the release announcement for the 337.19 Linux beta.