I've migrated a set of projects from Silverlight 3 to Silverlight 4 and experience problems with code analysis. Though code is fine and everything compiles/runs R# 5 displays errors each time I use Tuple<T,T>, it cannot resolve the type, highlights Item1 and Item2 properties as wrong. Stopped "understanding" Dispatcher.BeginInvoke(Action a) methods. This is very irritating behavior that continues even after clearing the cache (and physically removing it as "Clear" button seems to do nothing).
Any suggestions how to solve the problem?