Hi the Telerik Team,
I upgraded my Visual Studio from 2008 to 2010, and I get a designer error on my xaml.
Type 'telerik:MediaCommands' was not found
This error appears eveytime first time I open my xaml page in my project and disappears if I rebuild.
But if you close the xaml page and opens it again, the error appears again.
I just used a sample of your MediaCommands and telerik buttons code for it.
Here is a capture of my screen so you can see.
It's not a blocking error, but It does not permit me to work with the designer.
If you have any clue.