Hi,
   I created a custom template for my tab control.  It was all working correctly with the Silverlight RC1 compatible release of the RadControls.  After upgrading to the latest version there seems to be one issue.  I am setting a margin on the ItemsPresenterElement ItemsPresenter.  This margin does not seem to be working.  The rest of my template customizations seem to work correctly. 

Is there anything that changed with the latest release that could explain this?

I figured it out.  My template was not working at all.  Only the TabItem template was working.  I was setting the Template and not the TopTemplate.  After setting the TopTemplate all is working fine.