Using the Silverlight PivotViewer Control and seeing NotFound when deployed on IIS

If you build and test your lovely new PivotViewer SL app and then when
you deploy to a full IIS server you see "NotFound" reported for your
collection, then...

Make sure you've set the mimetype for .cxml, .dzi, .dzc all as
text/xml within IIS for your current website.

Worked for me :)

Helpful suggestion found on :
http://forums.silverlight.net/forums/p/194861/452655.aspx