We're using FTP Proxy and I believe I have a FTP Caching issue. I'm using
a FTP client program to go out and grab antivirus updates hourly. The
problem I'm having is that the FTP client always seems to grab a cached
copy. Consequently, our virus programs think that they're already up to date.

If I manually connect to the site and download through a browser the new
virus signatures are then applied correctly.

I've tried changing the FTP revalidation time to 1 hour in BM Setup, but
that doesn't seem to make any difference.

Anyone have any ideas?