Hi,
i would say it's at Special:Allmessages and then Monobook.css
would that apply to other skins as well?
No.
Too bad, because I'd like to have my css/javascript files work for all skins.
To change the CSS for a skin, alter the wiki page MediaWiki:<skinname>.css, where <skinname> is the internal name of the skin - monobook, standard, classic, cologneblue, chick, etc.
This sounds error prone.
No other way?
Patrick