I just checked and I am running; MySQL Version 5.1.73-cll. I've not run it on those higher versions of MySQL, and I've not had any clients running on that version either.
If you had it running fine on MySQL 5.5, I would consider dropping back to an earlier version of MySQL. If you need someone to help with that transition, contact me at
my page (you can also call during normal business hours - please leave a message if I am unavailable and I will get back to you right away):http://bgswebdesign.com/Contact-Us.php
I can help troubleshoot and fix, as well as tune your LMP installation, I've installed and tuned LMP installations on over 20 different hosts (all over the world, throughout Europe,
Asia, and the USA) so I am familiar with anything that needs to be done to tune your setup. My minimum charge is $80.00.