Although this is an old thread, I found it while I was searching for a solution to my own disconnection problems with FileZilla. I'm using FileZilla 184.108.40.206 on Linux and my alternate client is gFTP. With Filezilla, I was disconnected after a short time. The disconnection was even recorded in the message log "Disconnected from server". With gFTP, I could stay connected to the server for hours or days without being disconnected.
Although my problem was with an SSH (sftp) connection, I'm pretty sure that it would occur with regular FTP connections as well.
FileZilla disconnecting me, not the server.
The solution was to set the "Timeout in seconds" to 0 on the "Transfers" page in the Settings dialog, effectively disabling it. Logically, I would have assumed that the timeout only affected active file transfers. However, disabling this timeout fixed the problem.
I actually found the solution on someone's blog: http://www.bala-krishna.com/filezilla-d ... roblem-fix
I didn't read all of the messages in this thread as they were too flamey for my taste. However, with regard to asking questions and banning people, I'd like to suggest that botg ban himself... You might be a talented programmer, but you don't have the right demeanor for this type of forum. There's no reason you should, either. If you're a programmer, just write programs.
As far as support is concerned, we're getting all of the support we've paid for and lots of free software products do just fine without any direct feedback from the developers. Use Google as an example... has anyone ever tried to get a Gmail bug fixed?