Hello, we're using the Silverlight 4 RC controls and we have noticed this little problem with RadDocking. We have a RadSplitContainer with a RadPane configured with CanUserClose to false (we don't want the user can close the pane because it contains the main menu of our application in a Outlook fashion). The problem appears after the user has collapsed for the first time the radpane in radsplitcontainer. When the user expands the radpane, the close button re-appear even though the canuserclose is set to false.
Could you help us?