I upgraded the WP Multisite network from 3.5.2 to 3.8.1. I also use the WP Multisite Domain Mapping plugin to allow each subsite to go to a different domain. The problem is that, after the upgrade (went through without any issues), a couple of the sub-sites are still loading 3.5.2 when viewing it publicly (in the HTML source, the generator tag shows 3.5.2). How can this be happening? If I view the site as a logged in admin, the generator tag shows 3.8.1.
I believe this is causing the sub-sites to not load any of the latest changes that I have made on the site. Cleared cookies/cache and all that and still does not load any of the new changes (also viewing through incognito does not load new changes).