After installing VS2010 SP1 I had to change the target .NET Framework version to 3.5 to be able to recompile the SF source. They (Microsoft) fixed a "bug" that allowed projects to reference assemblies that had a higher .NET framework reference. SF reference the SQL 10 assemblies, which target 3.5. This was a problem since SF source targeted .NET 2.0. I hit this in quite a few projects. So I guess my question is this.