Comment 21 for bug 839740

The attached branch, lp:~mhr3/zeitgeist-extensions/scheme-detection Remove , by Michal stands a good chance of fixing this issue:

 * It fixes a potential race, where we might end up trying to put data in a corrupt index
 * It removes the code branch where exception happens with some simpler logic
 * It forces a rebuild of existing indexes, meaning that anyone out there stuck with a buggy index will have it cleaned up