>>I think the only thing you can do is watch for the second appearance of the long message bar, after the thermometer reaches 100 % (I'd expect it to boil, but it's percents, not Celsius degrees) - that's when it reports to Michel's server that the download is complete and it can move your "last message read" marker. The moment it goes away, you can disconnect - well, manually...
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>That's how I do it at the moment. The only problem is that I have to exit Navigator and go back in to be able to send replies.

Exit Navigator? I don't have to do it. We're talking about 2.0, right? (Older versions won't work, anyway.)

I just disconnect (using the icon in the Windows tray), and continue with Navigator. I save all the replies (can't send while I'm offline, of course), and later when I get back online, open the "messages to send" window and click on "send". Why would you have to exit?