i got this also… i just upgraded from 2.1.3 to 2.2
i did not backup/export/import my database (maybe i should have)
i just downloaded, deleted files, uncompressed and ran upgrade.php… all my spanish-language chars got messed up (and other chars like em dash)
i have just spent about three hours re-typing every single spanish character in every post (good thing i did not have that much posts written)
