Hi Richard,
Sorry for delay in getting back to you,
We are able to reproduce the issue 'Header issue with TreeViewAdv'. As per our Forum regulations , we will not be able to share the fix for this issue. However, if you are interested in receiving the fix for this issue, then, we would request you to use our Direct-Trac Support system to resolve all your technical queries.
For more details, please login into
http://www.syncfusion.com/Account/ and we will be happy to help you.
Regards,
Karthikeyan.