This stuff doesn't seem like RC quality to me. IMHO, it should have been called Beta 3. A few things that I've noticed within the first few minutes of testing are: 1. ComboBox intermittently crashes Silverlight, it pops up a dialog asking if you want to debug even though you are already in debug mode, 2. DataGrid rendering problems, if you have a DataGrid in a TabItem and switch from the TabItem to another one and back again, it blanks out the selected item and it can no longer be selected, 3. Still no ValidationRule; I submitted a Connect request for this and it was closed without explaination (read it still has piss poor validation support (is implementing this really that difficult?)), 4. ListBox seems to have issues with not rendering the selected item as being selected if you select it programatically, 5. other rendering issues with DataGrid where you resize the window and parts of the DataGrid contents aren't rendered properly. I guess this is why it's better to say "it will be done when it's done" rather than saying it will be done by the end of the year whether it's stable or not.
