I just downloaded xslimmer, and tested it on my mba. I looked at the before, and after, and my available hd space went down. I'm guessing most people back up their applications, and then move the backup to a cd/dvd? Does xslimmer work as it's supposed to, and does it affect any programs? I understand that they blacklist, but it makes me nervous deleting code from programs. I used monolingual ( and did a clean instal), but i'm about to instal cs2 etc, and if I can run xslimmer, great.