The referrenced bug suggested that you have php binary installed in your system elsewhere which is causing a clash of symbols between the packaged version and the custom version you probably installed from sources (or from dotdeb or from some other place in the universe).
I don't think there's a bug in the packaging. ** Changed in: php5 (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to php5 in Ubuntu. https://bugs.launchpad.net/bugs/1093428 Title: Cron job reports unable to load pdo_mysql.so To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/php5/+bug/1093428/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs