Did the PHP upgrade affect tidy in some way? Some pages are severely broken e.g. by unbalanced div or table tags (both Vector and monobook). Only two reports on #wikimedia-tech in two days, so maybe no real change, but I used not to hear any. :) https://www.mediawiki.org/w/index.php?title=Extension%3ABugzilla_Reports&diff=844734&oldid=773425 https://it.wikipedia.org/w/index.php?title=Utente%3AVale14orla&diff=63098711&oldid=54419590
Nemo