I ugraded to 1.3.33 today and notice a problem with some specific pages. All others are OK.
These pages are Events pages from “The Events Calendar” by Modern Tribe. The middle portion of the page now shows in full width while the header and footer are OK. See exemple at http://lelaurier.net/evenement/ca-finit-bien-la-semaine-le-15-juillet/
Not sure it is due to the upgrade but only notice that after upgrading.