I agree. I did do new upgrades on 5.5 first, stupidly in hindsight. I should have left 5.5 alone to keep on truckin' on but I was seduced into thinking all was well. The upside: I've actually had a few days off. :-) The downside, tomorrow, I'll need to redo extensions for 5.5 to keep working. So, tomorrow, back to the salt mines in 5.5 with reinstall of all the older extensions.