I also tried installing this mysql driver:
as reccommended on this page:http://community.tableau.com/thread/127592
but it still didn't work...
also have tried the 3.51 version with no success either. I can connect to the infobright instance with other apps such as heidisql as well as cmd line, but not through tableau...
From the 'Connect to Data' screen, are you choosing 'MySQL' or 'Other Databases (ODBC)'?
I am using Tableau 8.1 Desktop (and Server) with Infobright and I can connect using 'MySQL' but not 'Other Databases (ODBC)'.