Roller breaks on MySQL 5.0.3 and higher releases due to the use of the BIT type instead of TINYINT. I think MySQL is up beyond 5.0.18 now, and lots of people are running recent versions of 5.x.
Prior to 5.0.3, BIT was a synoynym for TINYINT(1). It no longer is, and it seems not to hold a boolean type properly (not sure why). People on the users list have been hitting this left and right with different symptoms. We probably should change the MySQL createdb and upgrade scripts to use TINYINT(1) instead of BIT before 2.3 releases. Users have figured out to do this themselves. A release note is a (much less preferable) second option.
