On Feb 27, 2006, at 8:30 PM, Walt Daniels wrote:

For instance there is a severe problem that prevents 4.6 working with MySQL 5.12+ and ISPs are converting to it.


http://dev.mysql.com/downloads/mysql/5.1.html

NOTE: This alpha release, as any other pre-production release, should not be installed on production level systems or systems with critical data. It is good practice to back up your data before installing any new version of software. 

Kieran