What FTP Client do you use?
Lately, however, AbsoluteFTP (now called SecureFX) likes to download 0-sized files about once every 3 times on one of our computers. Other programs don't do this and it doesn't happen on any computer.
I used to like how CuteFTP allowed multiple instances at a time (i.e. one for the public folders and one for the admin folders). This made it easy to upload changes made in 2 seperate areas without having to navigate folders.
So, I think we'll change to a new FTP client.
What do you use? What do you like about it? What are it's drawbacks?

I just installed Fire FTP, which is a firefox plugin, but haven't had a chance to try it yet. http://fireftp.mozdev.org/