FTP User Options
You can set "0" in the following options, but it doesnt work for the specific ftp user:
Dateiquota, Uploadrate, Downloadrate, Uploadbandbreite, Downloadbandbreite
So, I guess 0 is not a valid setting, although you can set it. Would be nice if ISPC will warn you. If you set eg "1" it works.
Furthermore those options are only available for admin. Bug? Or why?