Hi Elliot,
I’ve got a new error with ACF 4.1.8 :
ReferenceError: wp is not defined
http://…/wp-content/plugins/acf-gallery/js/input.js?ver=1.1.0
Line 298
_media.frame = wp.media({
I suppose that wp is a wordpress variable that is not defined in WordPress 3.3.2 ?