DirectX 9.0a SDK is available

There are some performance tweaks, support for anti-aliased render targets, some DirectPlay fixes, and a Managed DirectX security fix. For developers there’s some new D3DX functionality, otherwise it looks pretty much the same. If you’re not a developer and you already have DirectX 9 installed, you probably don’t need to worry about this update unless you’re told you need it by a hardware vendor. You can get it here.