If you have gone through the normal troubleshooting steps… deactivating other plugins, switching to a default theme, etc… and the problem persists, and it is also cleared up in an earlier version of ACF then I would suggest
submitting a support ticket
http://support.advancedcustomfields.com/new-ticket/
These forums are for getting help from other users and a support ticket is a more direct route to getting bugs corrected.