@Mark: Please check if there are any errors on the page that might be causing the issue that you experience. In general, not applying the styles and the misbehavior of the control can be caused if the styles and the scripts needed for the controls are not loaded correctly.
@Richard: The issue that you experince could be caused if the resources are not loaded correctly but in such case none of the RadControls will be working. Therefore having the information provided we are not able to determine the exact reason. Please open a separate ticket where you can provide more information the exact issue (send us the steps neede for replicating the issue and information the exceptions that are thrown on the page, if there are any).
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