How to fix SP1 Silverlight theme damage
If you see this,
Then for each theme, navigate to this folder.
C:\Users\YourUsername\AppData\Local\Microsoft\VisualStudio\10.0\Extensions\Microsoft\Silverlight Business Application (theme name)\1.6\~PC\ProjectTemplates\CSharp\Silverlight\t.zip
Rename BusinessApplication.Web to BA.Web
Yep, that’s all. You don’t even need to restart VS2010.