Filezilla is my FTP client flavour of the month

I've tried everything, from SmartFTP to CuteFTP and WS_FTP for uploading files to file and web servers.

Most of them have issues. They are either clunky or have compatibility issues, and particularly drag and drop problems. Cute FTP has the best interface, but I just couldn't get it to work with some servers.

Anyway, I'd recommend Filezilla. I have not had an issue since I installed this software (apart from the odd very minor drag and drop frustration). It is fantastic and free and apparently it works with Macs as well (if you're into that sort of thing ...).