http://blogs.msdn.com/karstenj/archive/2005/10/11/479924.aspxHaving worked with Avalon for a couple years now, I've gotten used to ignoring compiler errors. So often, the warnings are the result of XAML schema false positives and negatives. In the September CTP of Avalon, if you are working with 3D and you useen-USCommunityServer 2.1 SP1 (Build: 61025.2)