Silverlight 2 Update - Get the Developer Version
The latest Silverlight 2 update (Silverlight 2 GDR 1 (2.0.40115.0)) failed to install on my machine because it detected that I already had the developer version.
The error message and redirect to the correct file are well engineered, but developers can save some time by going straight to this page:
http://www.microsoft.com/silverlight/resources/help.aspx?errorID=1512
Ken