I've seen the problem in Clean theme as well as Elegance.
I've submitted it to the tracker: MDL-48015
(Personal note: I'm such a noob. This is my first Tracker report. Is it weird that I get a geeky thrill at that?)
In reply to John Iglar
Re: Elegance theme - gradebook issues (row & column alignment)
by Emma Richardson -
Lol - no, John, we are all allowed to celebrate our geekiness!!!!