During a Registry Cleaner scan, I clicked the Title Bar (or whatever you call it) because I was going to move the Window.
I was surprised to see that it changed from the solid Win98-like blue, that has been present since the new GUI, to the transparent Glass bar that I used to have before the new GUI. But then, a few seconds later, it changed back to the solid blue. : This has happened before but I thought I was hallucinating. lol
I guess this may mean that it's possible to have the new GUI AND the Glass title bar? And maybe there's a bug preventing that? It would be nice if we Vista users could get our Glass effect back, if possible.