I work through an unstable internet connection, and often get disconnected from my server. WinSCP does some strange things sometimes depending on how and why the disconnect happens. This has only been happening since I upgraded to the latest WinSCP.
The last error I got was "Server Unexpectedly closed connnection" in a msgbox that I couldn't get off the screen. Every time I closed one msgbox, another would pop-up. I had to use task mgr to close the app.
BTW, great app Martin. Everyone I know uses it. I've been spreading the word since '04.