Created Unassigned: [AvalonDock] version 2.5 not working correctly with Caliburn.micro [21976]

Hi,

Since update 2.5 of Community Edition AvalonDock is not able to display Caliburn.micro view. In the content area there is only the message "Cannot find view for System.Windows.Controls.ContentPresenter".
Uninstall 2.5 version and go back to 2.4 solve the problem.
With 2.5 Title and Icon are correctly binding with the view. Only the content is not OK.

Xaml code for the binding of the content :
```
<AvDock:DockingManager.LayoutItemTemplate>
<DataTemplate>
<ContentControl cal:View.Model="{Binding}" IsTabStop="False" />
</DataTemplate>
</AvDock:DockingManager.LayoutItemTemplate>
```