(Re comment #7) Yes, I think you've nailed the cause, and I can expand on that info somewhat.
The behavior of trying to retrieve messages when offline seems to be a function of account type, and each type seems to work the same in TB 2.0.0.0 as in 1.1.7. What I see is this:
POP account - correctly refrains from trying to download messages while offline, including at startup and shutdown.
IMAP account - will try to download messages every X minutes even if offline. This can be disabled by leaving X blank in Tools -> Account Settings -> Server Settings.
RSS feeds - will try to download messages both at startup and again every X minutes, even though offline.
A side issue is that it may no longer be possible to start TB offline. I use a shortcut with the "-offline" command line option, but it seems to be ignored in 2.0.0.0; that may be pursued as another bug. I still feel the root problem that the engine tries to download messages while offline ought to be fixed, though, so I'm not abandoning this bug.
(Re comment #7) Yes, I think you've nailed the cause, and I can expand on that info somewhat.
The behavior of trying to retrieve messages when offline seems to be a function of account type, and each type seems to work the same in TB 2.0.0.0 as in 1.1.7. What I see is this:
POP account - correctly refrains from trying to download messages while offline, including at startup and shutdown.
IMAP account - will try to download messages every X minutes even if offline. This can be disabled by leaving X blank in Tools -> Account Settings -> Server Settings.
RSS feeds - will try to download messages both at startup and again every X minutes, even though offline.
A side issue is that it may no longer be possible to start TB offline. I use a shortcut with the "-offline" command line option, but it seems to be ignored in 2.0.0.0; that may be pursued as another bug. I still feel the root problem that the engine tries to download messages while offline ought to be fixed, though, so I'm not abandoning this bug.