The three-column and the two-column styles use different padding/margin methods to achieve the same thing. Does one work and not the other?
In either case they work in Mozilla-1.1 and as far as I can see if Mozilla-HEAD gets this bit wrong it's a new bug in Mozilla. I have noticed that sometimes Mozilla and others have their own ideas of when they can collapse padding etc. But it seems your newest email is saying that the sponsor div's contents are spilling onto the content div. Hmmm.... That would mean that Mozilla thinks that 160px isn't wide enough to fit the text. Bollocks to that. Can you send me a cutdown screenshot please. And this time I really do have to get going. Won't be in email contact again until Tuesday. Allan. (ARRae)