Yesterday, May 13th 2008, Canon has updated the software suite that is bundled with DSLR camera boxes.
In particular it has updated Digital Photo Professional (DPP) to version 3.4, this is the program to develop RAW images.
Beyond compatibility with Vista SP1 a a couple of bug fixes, the noise reduction function has been improved and new lenses (e.g. extenders) are supported in the chromatic aberration reduction function.
The update includes the other softwares: Picture Style Editor v 1.3, Zoom Browser 6.1.1a, EOS Utility 2.4.0, RAW codec 1.3 (to see RAW images in Windows folder).
Download link here (just type your camera model and then choose the tab "software").