MySQL creator: version 5.1 released with “fatal bugs” →
https://marco.org/2008/12/01/mysql-creator-version-5-1-released-with-fatal-bugs
He blames Mårten Mickos, the senior vice president of Sun’s database group and former CEO of MySQL AB. According to Widenius, Mickos no longer treats quality as a priority and unilaterally chose a premature GA release date because “he needs something he can sell.”
Suddenly I’m very satisfied with the 5.0 series I’ve been using. MySQL wants you to pay a ton of money for frequent/recent updates, so I’ve been using the excellent and completely legal Proven Scaling mirror to get the most recent stable 5.0.x versions.