When I see aborted uploads, they often occur at the 8192 byte mark along with the status message "Error - disconnected". It occurs so often that it is hard to believe that they occur because people abort their downloads. Sometimes, I see another request for the same file resume. I bet at that point, the person will hear a "pop" or "snap" sound when they test their file out. I inspect all my files for noise, so any new sounds would be due to these mysterious aborts.