I recently upgraded my WP site from 3.3.1 to 3.5.1 and now the custom fields will not update. The fields show up when I add a new post, but their values disappear after I click publish or update.
I've browsed through the form already and have tried disabling all the plugins, removing all blank lines from functions.php, and disabling post revisions. None of those suggestions have worked. Any other suggestions would be appreciated, thanks!