Thanks for writing and sorry about the delay with our answer.
I have performed some tests with the RadListPicker
control by creating a sample Windows Phone 7 application and putting an instance of the control on the main page. The animations seem to work fine for me. It seems that the case that you report is not always reproducible and occurs under some special circumstances. Therefore it will be extremely helpful if you manage to give us some further details on how we can reproduce the case (the XAML structure you are using or sample app).
As for the issue with the PopupHeader
property of the RadListPicker
in Expression Blend I would like to inform you that we have been able to reproduce the case and we are investigating the reason for it. We will provide a fix for it as soon as possible.
Thanks for your time and do not hesitate to get back to us in case of further questions.
the Telerik team
Let us know about your Windows Phone 7 application built with RadControls and we will help you promote it. Learn more>>