I'm not using the XML declaration
<?xml version="1.0" encoding="UTF-8" ?>
I'm only using this DTD as a first thing in a page? which has no problem rendering in strict mode.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html lang="en" xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">
It validated as quirks mode with this site http://vesa.piittinen.name/doctype/
(I can't give the link to the site on which I'm working)
In IE 6 it shows almost standards mode, and in FF it shows full standards mode.
Should I change my doctype to get the same rendering in all browser?
Your doctype is fine..
The problem lies with a specific bug (IE6 double margin on floated elements) you are dealing in your other post.. See there for an answer to the problem ..