took me a little while to track this one down, in the event you get this its because the script manager does not have the EnableHistory arg set to true.
Yes - this is the only thing that needs to be done on the ASPX page in order to enable the integration with Browser history and Page Navigation for Silverlight.
Please let us know if you have any other feedback. We will be glad to assist you.
Regards,
Valentin.Stoychev
the Telerik team
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