Thank you for the provided project in your ticket.
I tested it with and without SPRadEditor and I was unable to reproduce the reported problems as shown in the following video: http://screencast.com/t/0DzfwfUt65
. This leads me believe that the problems could be due to some global CSS class(s) in your custom stylesheet that is breaking the appearance and functionality of the controls. Could you please disable the site specific stylesheet and test again the page? You can also inspect the page with IE developer toolbar / Firebug and see which classes are causing the issues.
If you are unable to fix the issues, please, give us more information how to reproduce them with the provided sample project.
the Telerik team
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