Quirks mode vs. standards mode

Hi,
Is there anywhere a list of things that cause browser go into Quirk mode?
I have pages that are validated with W3C transitional, but Forefox page info shows quirks mode. It's not like it makes any difference, but it is just puzzling. 
Thanks,
Lazar
P.S. I apologize if I am not properly replying to the archive message. I just clicked on Reply link.

Received on Friday, 5 June 2009 23:21:39 UTC