The Nvidia 331.20 drivers for Linux have been recently released. Among others, it comes with support for the OpenGL-based Framebuffer Capture (NvFBCOpenGL) and many bugfixes.
Some Fixes are :
Fixed a bug that prevented configuration files containing application profiles from being loaded when directories were present in the application profile configuration search path.
Fixed a bug that could lead to memory exhaustion in OpenGL applications running on 32-bit systems.
Fixed a bug that caused the X server to fail to initialize when DisplayPort 1.2 monitors were assigned to separate X screens on the same GPU.
Fixed a bug that could cause a deadlock when forking from OpenGL programs which use some malloc implementations, such as TCMalloc.
Fixed a bug that prevented Warp & Blend settings from being retained across display configuration changes.
Fixed a bug that prevented some settings changes made via the nvidia-settings command line interface from being reflected in the nvidia-settings graphical user interface and many more.