Exactly how do I do this? I switched to Vista default Aero theme, and that worked out okay, but I couldn't see any of the preview images belonging to this theme. I had to go to C:/Windows/Resources/Themes/CleanGlass_Aero_by_Eoin/ and double-click either CGlassB or CGlassB Segoe UI for it to appear on the list as Aero CleanGlass Style below High Contrast #2, with the right preview image. However, applying it results in the screenshot I gave you.
[link]
As you can see, Min/Max/Close buttons are too small. Also, I cannot see any transparency. Is there supposed to be some transparency?
Try switching back to the Vista default Aero theme and then select the Aero option with the CleanGlass image.
Vista make this process trickery than it was on XP unfortunately