If you work with DirectX, then there is a new update for DirectX 9.0, 9.0a. Info at the site says:
There are no new or modified APIs in this release. Specifically, this update includes:
Performance enhancement to the runtime texture management in Direct3D.
General performance improvements to D3DX
Fix for a potential PSGP memory overwrite in Direct3D.
Support for anti-aliased render targets added
Update for DirectPlay to address some network connectivity issues using some UPnP routers.
Managed DirectX Security fix.