The upload actually fails. These should be 16 byte files. A 0 byte file means that the FTP command channel works (we can tell the FTP server we are trying to initiate an upload, so it creates an empty file waiting for us to send the data), but the data channel connection through which file uploads and downloads take place is not working.
Make sure you're using the Passive FTP transfer mode.
Nicholas K. Dionysopoulos
Lead Developer and Director
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