I seem to have the same issue. Tried with both chrome and ff.
the JS console shows
Uncaught Error: Syntax error, unrecognized expression: #wp-widget-black-studio-tinymce-{$id}-text-wraptinymce.min.js?ver=4107-20141130:2 e.errortinymce.min.js?ver=4107-20141130:2 e.tokenizetinymce.min.js?ver=4107-20141130:2 e.selecttinymce.min.js?ver=4107-20141130:2 etinymce.min.js?ver=4107-20141130:3 f.selectpost.php?post=586&action=edit:4211 (anonymous function)post.php?post=586&action=edit:4252 (anonymous function)
load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,heartbeat,autosave,suggest,wp-ajax-respons…:58 Uncaught TypeError: Cannot read property 'top' of undefined
