Yes, and sort of "no".  I mean "yes" it does not auto-reconnect even though it is configured.  But often times I will get two error dialog windows on the screen at the same time when I come back to the desk.  One is the "error" I described, which I didn't think a "reconnect" would work with.  The other is something about being logged off for inactivity, even though I do have it set to persistently stay connected.  What's weird is that if I get the second error -- the logged out error -- the file transfer is often still happily transferring.  It keeps transferring unless I acknowledge the error and hit "ok" and then it will disconnect.  "Reconnect" also works.  But the "error" dialog is separate -- it's just the transfer that is failing.
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I can try to turn on logging right before I start a transfer but every time I've tried logging the whole app becomes non-responsive ("not responding").
BTW -- I tried the same download at the same time (on the same network) from another machine and didn't see the problem for the time I was trying it.  I am suspicious the problem is related to the fact that I am forced to run the problematic station via 802.11g wifi.  I think it might be related to the problem despite the fact I get great speeds when it works.
    martin wrote:
    So what you are saying is that WinSCP does not auto-reconnect, even if it is 
configured so? Can you try that with 4.2.3 beta? If that does not help, please post a log file.