I am using WinSCP 4.1.9 (Build 416) under Windows (Norton Commander style, german language) to upload files onto UNIX server (Type L8, No native text mode transfers) using FTP protocol. Sometimes (but continuous!) after pressing F5 to start ASCII file uploads (PHP scripts) WinSCP reports "Lost connection, time is up", reconnects and resumes. After that the destination file on the server is corrupted, with the last part of the file appended twice. After repeating the file upload (F5), the destination file has double size, after another upload it has triple size, and so on ...
Disabling the automatic reconnect does not solve the problem.
So I have to close the connection, reconnect and redo the file upload.
This is a significant problem, because the corrupted PHP script damages the related web site for some seconds!
The history page reports this error fixed since 4.0.1 beta, but it still exists in 4.1.9 (maybe in 4.2 beta?).
Can you send me an email, so I can send you back a debug version of WinSCP to track the problem? Please include link back to this topic in your email. Also note in this topic that you have sent the email. Thanks.