Stylesheet not showing in FF?
 

I've just finished a wordpress theme and it appears as though the stylesheet doesn't call up properly in FF/Opera, though it does in IE. I'm really not sure what the issue is as it calls up fine on one domain, and then not on my clients. This is a new fuck up altogether for me, I've never had this happen once in dozens of wordpress themes. It really confuses me because it works fine on my own hosting/domain but not another. Any ideas?

bump in hopes someone knows what could be causing this...