Thank you very much for pointing to that font tag. Please consider it a bug and write a bug report. In the bug tracker it won't get lost.
The Moodle change to the content layer via XHTML and presentation layer via CSS pragmatically goes the onion way. First change the rough outer and some more inner skins and after and after all the hidden skins that get visible afterwards.
If you compare versions 1.4 and 1.5 you will see that Moodle is on the best way to a clean separation of content and presentation. And every help on this way is very much welcome.
Urs