We load the "MySQL ODBC 3.51 Driver". You should be able to install any 3.51.x driver assuming it has the same name (as seen in the ODBC administrator). It looks like the driver on our website is 3.51.27. You might try the 3.51.30 driver http://www.mysql.com/downloads/connector/odbc/3.51.html#downloads
There are no guarantees that it will work correctly with Tableau since we haven't tested it. If that still fails you might try contacting Support. Good luck.
Thanks, that was it!
(I dunno why but I cannot mark your answer as being correct)