Having another issue with the RadSplitter, in that if you had a minimum size, or the header is smaller than a certain size... then when trying to reduce it past this size.. we get a transparent splitter.. as you can see in the following video (from the telerik demo) (this was tested in IE7, 8 and 9.. the video shows IE9)
http://www.youtube.com/watch?v=8pUvnGGpTOA
http://www.youtube.com/watch?v=8pUvnGGpTOA