I have "set fileformats=unix,dos" at the bottom of my _vimrc,
but still see the ^M's.
My guess is that the file in question has one line that lacks a
^M in the line, and thus, it vim concludes that it must use
unix-style line-endings. The likely culprit is the last line in
the file.
You can clean them all up with
:%s/^M$/
where ^M is entered by pressing ^V followed by ^M
Once you've gotten them all cleaned up, you can use
:set ff=dos
and then write the file.
If problems keep cropping up in files, somebody else's editor is
likely bunging stuff up.
-tim
