I'd suggest that you start a forum specific to the DotNetNuke implementation of the Telerik editor as the issues related to this implementation seem to be unique from all others.
In this forum we answer questions concerning the usage of our controls (as external) in DotNetNuke and the Telerik DNN modules/skin objects for RadEditor, RadMenu, etc. Note that questions about:
how to configure our controls which are shipped as part of the DNN Community or Professional editions
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.