CI and Quirks Mode

[eluser]pkrstic[/eluser]
[quote author="Developer13" date="1288385712"]WTF is quirks mode???[/quote]

When browser tries to guess what you tried to write, and skips doctype. Usually happens when you print something before doctype, ie files with BOM, or some error printed before, in all cases this means you have some unwanted text printed before doctype.