Hey, now! :) I used to work at a print shop (not, admittedly, a poster-printing shop; we didn't do one-off or short-run stuff), and I can tell you the lil funky thing goes both ways. I've seen Hell, and it is trying to get CMYK separations on a newsletter built in Microsoft Publisher while the client's standing behind you saying, "But it works on my inkjet at home!" I'm sorry; was that out loud? :)