Have been busy setting up a demo site for a few days now, without any problems – except I have run across one now.:)
Regarding the Profile Nudge widget; if you try to input information when it “nudges” you to do so e.g. your phone number – you are then faced with a “Security check – there is something wrong” white page. (URL …/wp-content/plugins/ht-profile-nudge/update_profile.php)
I am assuming it has something to do with if ( ! wp_verify_nonce( $nonce, 'update-profile' ) ) but it looks correct…???
Tried disabling all plugins except the Profile Nudge, then tested it, that still landed me on the “Security check – there is something wrong” page.
Created a new user but was faced with the same problem.
@Luke, have you ever come across a problem like this?