Installation guide (http://bugs.sakaiproject.org/confluence/display/DOC/Database+Configuration#DatabaseConfiguration-deploy) states: "For MySQL the 3.1.10 connector should be used, while for Oracle the 10g driver should be used, even if the database is version 9i. The 9i driver will not be sufficient. "
However, I've been unable to find a download source for the 3.1.10 connector. The MySQL site has 3.1.12 (maybe this resolves the issues with 3.1.11?). I've Googled and searched the MySQL site to no avail.