Eric,
Not sure you are aware that there are several "warnings" resulting from your common.css file in under Mozilla 3.5.2 under XP.
One property and two values are not recognized.
These can be generated by view the status page
Mozilla Parsing Warnings
Moderator: Moderators
Mozilla Parsing Warnings
Linksys WRT1900ACv2
Netgear WNDR3700v2
TP Link 1043ND v3
TP-Link TL-WDR3600 v1
Buffalo WZR-HP-G300NH2
WRT54G-TM
Netgear WNDR3700v2
TP Link 1043ND v3
TP-Link TL-WDR3600 v1
Buffalo WZR-HP-G300NH2
WRT54G-TM
Re: Mozilla Parsing Warnings
Yes, I'm aware of this. Those CSS properties are necessary to make the grey-out-effect when settings are applied and the router is "busy" on IE and really old versions of Mozilla, and they only generate warnings in other browsers. It's kind of a hack, but it allows greater platform compatibility which is worth the annoying errors.