I've had this problem forever and never got a solution so I thought I'd ask you guys!
My CSS doesn't work (load) when I'm testing my WordPress site with Firefox under Omnisecure v3.0a2 - WinXP. If I take off the DTD it would work but then when I upload the page something would go wrong because DTD/No-DTD = different outcome?
Anyone has the same problem? It WOULD work if I dump the CSS in the header but that's just messy!