I played with it on a test one of my forums and switching from Percona to it caused an error where the forum could not connect any more. I was just playing around and instead of taking a bunch of time to trouble shoot it I just burned my VPS backup image back that used Percona. Will have to set up another VPS to test with and see exactly what the problem was.
I know it's going to be something simple as I remember discussing it with another person recently.