Monty says: Oops, we did it again (MySQL 5.1 released as GA with crashing bugs)
http://monty-says.blogspot.com/2008/11/oops-we-did-it-again-mysql-51-released.html

Andrew is the original developer of MySQL & has recently left Sun.

The reason I am asking you to be very cautious about MySQL 5.1 is that there are still many known and unknown fatal bugs in the new features that are still not addressed.