Breaks userstyles (Score 1)

This version use new class names and therefore breaks the userstyle I was using in Firefox. After some digging in Gmail 2.0's source I created this new style for enabling monospaced fonts:

@-moz-document url-prefix(http://mail.google.com/),url-prefix(https://mail.google.com/)
{

.ArwC7c, .rSfjbb, .mMl8gd, .iE5Yyc {font-family: MonoSpace !important; font-size: 9pt !important; }

/*
Mail: .ArwC7c .ckChnd

Subj: .rSfjbb
To: .mMl8gd
Cc: .mMl8gd
Bcc: .mMl8gd
Body: .iE5Yyc
*/

}