1. Css.php loads all.css specified style sheets after the media specific ones. This should be reversed so that media specific style sheets override the style sheet that applies to all media.
2. Right now all.css styles get added to both the print and screen style sheet, duplicating the rules unnecessarily and increasing the download. With my plugins installed it's about 20%.
The enclosed batch separates the loading of the stylesheets into three stylesheets: all, screen, print and moves the stylerules that apply to all media from the screen and print version into all.