I have never had that suite pass its tests on OS X and I've been installing it since the Public Beta. There are several environment variables you should set if you actually want to try to get the tests passing (try it from a command line instead of the CPAN shell and check all the verbose test feedback for what you should set). I would not normally recommend this but I've done "force install" on that package (in its various versions) on OS X beta, 10, 10.1, 10.2, 10.3, 10.4, and 10.5 (on three different boxes; one Intel) and I've never had a single problem with DBI code using MySQL.