>In FF on my system, I can put the mouse pointer on the UT toolbar, press and hold the Ctrl key, then mousewheel up/down to make the font size change. It looks correct (centered vertically) at all sizes, not clipped at the top like Lutz's example.

Yes, what you have is the perfect representation. There seems to be external factor affecting his browser.

>I suspect Lutz may be using large fonts in Windows itself.

This is still existing. :)