One of our clients pushes a daily data feed to their FTP server, which we log
in to using a scheduled task in CF and download the file and process the data
feed.

Since we upgraded to CF7, it appears that CF's FTP connection can't "see" that
file (neither a directory listing nor a "File Exists" can seee it). If I
manually log into the FTP server (using the exact same username and password),
I'm able to see the file. If I then copy the file to some other name, CF can
now see the new file (but not the original). If I delete the original and
rename the copy back to the original's name, CF can now see the file under the
original name.

To me, this sounds like some weird permissions issue, but why would I be able
to see the file when manually FTP-ing in with the same exact credentials?

Any ideas?

Obviously, I'd like to have our client try pushing some more files so we can
test this some more, but it's a huge company so they're not that easy to just
call up and ask, "Can you try something?"

Scott