I have tried to reproduce the unexpected behavior but to no avail. You can watch a short video with the test in the attached archive and then tell me what I am missing.
I can suggest that you try the following steps:
- Can you confirm whether you are using the latest official version of RadControls - 2013.3.1114 and if not does upgrading to it resolve the issue?
- You can try removing all the custom CSS from your page and if that fixes the issue then start turning one by one the styles until you isolate and fix the problematic style rule.
If the above steps, however, are not helpful I can suggest that you try to reproduce the issue with the attached VS example and then tell us what changes you have made so that we can provide a reliable solution if possible.
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to the blog feed