I have noticed that you have already resolved an issue for RadScheduler + Sharepoint 2010 in the following thread 676495.
If you are still facing the issue described here, please send us your configuration file for further investigation.
It seems that this problem is caused by some configuration settings, so could you please clarify what version of our RadControls you are using? Clarifying whether you use just the RadScheduler control in your page or some other RadControls will be very helpful.
the Telerik team
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