Ok. Sure sounds like the same issue. The only thing different is you mentioned you previewed the file in this thread (so I assume you have possession of the file).
In the other thread you mentioned you don't have the file. So, is your friend having the same (or really similar) problem on two different files?
Just want some clarity here. Can you post a screenshot of the toolpath preview for this particular file?
EDIT: well, maybe screenshot won't do any good since you said it looked perfect in the preview
-ShopBot Buddy PRSAlpha CNC