MySQL 5.1.18-beta has been released
May 18, 2007[From MySQL Lists]
We are proud to present to you the MySQL Server 5.1.18 Beta release, a new Beta version of the popular open source database.
Bear in mind that this is a beta release, and as any other pre-production release, caution should be taken when installing on production level systems or systems with critical data. For production level systems using 5.0, pay attention to the product description of MySQL Enterprise...
The article continues at http://lists.mysql.com/announce/457