I've noticed since upgrading to 4.x a few anomalies.
When starting The Bat! and it's checking incoming mail it will load up new emails, then freeze for 1-2 minutes where I can't interact with the application. It looks like it's downloading messages still but several new messages are no longer showing.
The application will then unfreeze and all unread emails are showing.
Another problem has been the filters. None of my active filters seemed to do any filtering anymore and I've had to re-create each of them as I've noticed they're no longer working.
When starting The Bat! and it's checking incoming mail it will load up new emails, then freeze for 1-2 minutes where I can't interact with the application. It looks like it's downloading messages still but several new messages are no longer showing.
The application will then unfreeze and all unread emails are showing.
Another problem has been the filters. None of my active filters seemed to do any filtering anymore and I've had to re-create each of them as I've noticed they're no longer working.