LabColor - L is now % 100
Type Serialization Strategy -> members returning object are no longer serialized to string as this makes it imposible to deserialize later (to what type?)
Xaml Behaviors, ItemSourceWithPreserveSelection added (fixes a ComobBox behavior when changing ItemsSource resets SelectedValue in underlying binding source)
DragDrop - added handling of Drag operations originating from other applications, or same application but not using DragDrop plumbing
MixedCompositeConverter - now can be set to ignore usnet values
IndexToBrushConverter added
DragInfo - can now be constructed from any Drag event
FrameworkExtension, ClearBindingOrReplaceWithDummyValue() -> updated removed binding message
Color extensions -> added converter to WindwsMediaColor
SmartBinding - added support for TargetNullValue and FallbackValue
Boolean Expression Tree added