Hi..
 
I have been using AvalonDock 1.3 for some time. Recently I reinstalled Windows (Windows 8 Release Preview) and installed Visual Studio 2012sp1 and 2012RC and AvalonDock 1.3.
 
Now, when I open a DockableContent it only shows below icon instead of the Window.
 
But when I build and run the project, all DockableContents are shown correctly.
 

• sample code -
   
  <ad:DockableContent x:Class="wpfDC"
  xmlns:ad="clr-namespace:AvalonDock;assembly=AvalonDock"

 
</ad:DockableContent>
 
Please help me.