Created attachment 493204 [details] Screen shot showing the problem Yesterday I used Thunderbird in offline mode and composed a few emails. When I got back online, the message were sent and recorded in the activity manager window. I've done quite a few things since then, but the top of the window is still occupied by the three events from the getting back online session. Hope this is clear. I didn't spot anything unusual in my Error console. See the screenshot for good idea of what's borked.