Just spent the weekend updating PHP, MySQL, PHPMyAdmin, hMailServer, RoundCube, and more. Some bits were more than 6 months old, with dozens of security updates between the versions I had and the latest stable.
Because I am concerned about security, I have resolved to check for updates to the most important components at least once every 2 months. How about you? Is a 1 year old installation of PHP sufficient, or do you keep your stuff rigorously up-to-date? ITT: Vote on how often you update your stuff!