I have just installed Visual Studio Upgrade 3 RC, and the Blend preview with Sketchflow. I get the same errors in my project. Most types seems to be unsupported. It happend before the update as well. I can still build and run the project but i cant use the
designer.
Any clues to what i can do? Please, I really need to use Blend.
Edit:
The problem was in Blend (Preview version with Sketchflow), not in Visual Studio. When I opened my project in Blend I would get a long list of unsupported type errors, eg 'Grid is unsupported in Windows App Projects'. The project worked fine in Visual Studio.
However, I get no errors in the (non-preview without Sketchflow) version of Blend, that is installed together with VS 2012 Upgrade 3 RC, so I guess the issue was resolved. Thanks!