Microsoft always admitted that the WPF designer in VS2008 was not very good. I believe that VS2010 uses the same designer as Expression Blend.

>Well if that's the case why did MS put an "XAML editor" in the VS IDE? Oh wait. Let's see. We'll give em a free, crappy editor that they'll find powerless to create those nice UIs/UXs. They'll quickly give up then we can make em fork over some more dough to buy a real XAML editor.