The commas instead of dots confuse me. I'd argue that ie7,replace,ie6 is a combination that isn't really necessary... what purpose would it (practically) solve?
Re: Rewriting the skin file parser...
« Réponse #45, le 27 Mai 2012 à 15:41 »
* Sort selector lists before generating the CSS files. This helps a bit with overall gzip compression rates. (Class-CSS.php)