OK, if I'm right, the tooltip window is the popup window you get when you mouse over the items you're inspecting, correct? If that's correct then I hate to tell you this but my UI works fine. The only thing I can suggest is that you completely make sure 'eXtreme' is uninstalled... then run the install for v2.17.1
http://www.eq2interface.com/download...ad.php?id=3903
Something must have gotten corrupt when you ran the install is the only thing I can think of.