I dont know what addons you have nut i have loads of them and custom coded and they will not work, i can run base install no problems but when i start adding addons its all goes to pot.
I have just deployed a new server for testing and working out the new way of phpvms currently in dev, im not going to waste any more time on 5.3, 5.4, 5.5 or 5.6 compatibility, there is just too much work to get it all together.