I installed the GNotifier extension to Thunderbird. The resulting notifications did not leave a persistent sign anywere in the GNOME desktop interface, which is what I installed GNotifier for.
When I removed GNotifier, I stopped receiving email popup notifications. I tried reinstalling GNotifier, resetting the notification type to Thunderbirds default, and removing GNotifier again, but for some reason that didn't seem to work for me either.
I don't want to wipe my Thunderbird profile, but I want my mail notifications back! Help!