Thanks for getting back into the thread. Can you replicate the issue with one of the embedded themes and controls loaded on the page. I see that you have some custom /styled controls on this page and the problem could be related to js or css loaded on the page. If you can narrow down and isolate this issue ( for example: if it is related to your theme or css/js ) we could try to come up with a solution for you.
the Telerik team