Jerry,
The "BTW, all people who reported this tested it with the latest versions and it fixed it." response referred to a FTP Upload bug that we fixed in the February 2010 maintenance build.
Please re-read the original support request. Chris said: "...so I tried the install for a different app to the same FTP directory. Uploaded perfectly..."
Because it worked for another SB install, this was not caused by "port fowarding" Enabling the "PASV Mode" option in the Release Distribution tab is useful for certain types of firewalls that do not allow FTP servers to initiate data connections back to the connected client.
Friedrich