Windows7 is also suffering from the " :\ becomes :¥ " problem and will not work, as Vista, with the KonicaMinolta FTP-Utility.
Found in the mean time a very good and simple alternative. This
freeware is doing to same and even better cause it has a log where you can see what happens.
Quick ‘n Easy FTP Server Lite Version 3.1 Quick 'n Easy FTP Server Lite
Just in case you need it.
Though SMB scanning might be the future because of its simplicity I still believe Scan to FTP has its advantages too.
Hans