The problem should be fixed in the latest Q3 2011 SP1 version 2011.3.1305 version of RadControls for ASP.NET AJAX.
In case you use RadEditor with external dialogs
, make sure that the EditorDialogs folder is taken from the same installation as the Telerik.Web.UI.dll.
If you are unable to solve the problem, isolate it in a sample working project and send it for examination via a new support ticket.
the Telerik team
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