There appears to be some issues with SuperInspect and the new font features in 1.10. If SuperInspect is loaded, none of the font changes from ClearFont work. If SuperInspect is not loaded, ClearFont works fine. I realize SuperInspect does not have a 1.10 version out, so you may already be aware of the issue(s) and fixing it, but just thought you'd want a heads up =)
ClearFont:
http://www.wowinterface.com/download...fo.php?id=4528