While converting 1 of my project to beta 2, I encountered some errors with dynamically loaded objects created via XamlReader.Load(rawxml). In 1 case rawxml contains storyboards, which when they ran, I got an error that they could not find the TargetName. I ended up using the following crude workaround:
//creation
Storyboard m_Storyboard = (Storyboard)Go to the complete details ...