Changes in MySQL 5.5.21 (17 February 2012) :
http://dev.mysql.com/doc/refman/5.5/en/news-5-5-22.html
Download :
http://dev.mysql.com/downloads/mysql/
http://dev.mysql.com/doc/refman/5.5/en/news-5-5-22.html
Download :
http://dev.mysql.com/downloads/mysql/