To solve this problem I did as jonaz__ did. I killed the trackerd and tracker-indexer, and then deleted the contents of ~/.cache/tracker, and of ~./.local/share/tracker/data. After a reboot, I was good, haven't got the error message since I did this 4 days ago.
-- Corrupted tracker index causes persistent applet error popup https://bugs.launchpad.net/bugs/361560 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs