First of all, I'd just like to say that I think Synchronize It! is a fantastic program! You've done a great job.
I have a problem using ftp:
I have an ftp server on a non-standard port.
The latest version of Synchronize It! crashes when I try to connect.
The port I use is > 21000.
FTP on non-standard port number
Thank you for your report! I have made a fix in beta: http://grigsoft.com/blog/?p=67