I have reverted back to 3.5.1 as I happened to have a local backup. Functionality is now restored. It’s hilarious that this falls under a ‘stable’ release.. it obviously wasn’t tested at all.
Equally hilarious is the fact that older or archived versions are not available ANYWHERE on this site or at advancedcustomfields.com. This is absurd. When the end product like WordPress has a one-click upgrade button and nags, you need to provide a way to downgrade to ACTUAL stable versions, and in fact should keep iterations of each version of the plugin easily downloadable. Can’t believe such a popular plugin is not following best practices, or that WordPress’s plugin archive does not do the same given inherent fragmentation in this kind of environment.
I am not using WP 3.5.5, the only thing I updated was ACF and validation on hidden fields was broken.
I’m having the same issue. Please update us on this.
