Hello Mark Hanson,
You can find the answer to your question in your support ticket. I am posting the answer again for those who may be interested in the topic as well:
1) Please, add these lines of code after you add a Tab:
|ribbonTab1.IsSelected = true;
|newTab.IsSelected = true;
I logged this issue in our ToDo list.
2) We will investigate the problem and we will try to provide a fix in some of the upcoming releases.
3) Currently RadRibbonBar doesn't support that. We are aware of this
limitation and we will consider implementing the functionality in the next
4) These glitches are caused because Vista Aero effect is controlled by DWM but we draw with GDI+ in general. We will try to improve the rendering when Vista Aero is used.
the Telerik team