Thread:User talk:Dantman/Subskin 'overrides' happening before original css

I've follow your tutorial on subskinning Vector, and I've verified using FireBug that the overrides I'm applying in my own skin are being added by the ResourceLoader, but not after all the Vector screen.css stuff is applied so the changes aren't showing up on screen, but they are in the minified css. Any ideas on what might be causing this or how I might force my css to the end of the line so it overrides the Vector stuff?