You got all excited with the SilverLight 1.0 RTM two days ago. Developing new, unseen cool RIAs. Converting already working applications and web sites to SilverLight. The usual state of affairs.
But stop and think for a moment. Have you tested your SilverLight dependent web site from Windows 2000? SilverLight requirements page says only v1.1 will be supported in future, whose RTM is about 1 year away. SilverLight 1.1 is forward compatible with v1.0, but hey, why should ‘I’ wait for v1.1 to be supported on Windows 2000.
Moreover, even if you try to install either version on Windows 2000, SxS fails and whines that it cannot find gdiplus.dll anywhere in the directories listed in %path%. When you manually copy gdiplus.dll safely to some accessible directory, you get the splash screen saying system configuration not supported.