I have just deleted a lot of old messages (about 3,000) from my Thunderbird 3.0 profile. When I now use the new search feature (search all messages), TB still finds the deleted ones.
I deleted them this way: I moved the messages to an own "archive" folder (not the built-in archive feature). Then I stopped TB and moved the archive files and folders to a different place on my file system. Then restarted TB. I archive my messages this way for years now.
So, it seems that Thunderbird does not notice the deletion of my messages, thus the index is not updated. How can I tell TB to instantly rebuild the index?