Vista - Possibly a bug? : More clarification on the error involving animations hosted within a WinForm.

I thought I'd start with a clean message for clarity sake.

I have some XAML, specifically taken from a MSDN sample, and am hostinging
it within a UserControl. This user control and the Xaml are compiled against
the 2.0 framwork. However, the form hosting the UserControl is against the
1.1 Framework. The basic XAML runs in XAMLPad, and appears fine when being
hosted in the 1.1 framework. However, animations do not work and get a
run-time error.

This error is: "The Name 'myWidthAnimatedButton' could not be resolved in
the name scope of 'System.Windows.Controls.Button.'" That name is the name
of a button declared earlier in the XAML. (See the SDK documentation if you
want to see the code). Again, this XAML compliles fine in XAMLPad and runs
fine, too.

So, the 2.0 Control hosting the XAML works fine in a standalone 2.0 Project.
Just not in the 1.1 application (It's using a form of reflection to
dynamically load the DLL, I think).

Any ideas on how to address this? Or is this something explicitly not
supported?