Hello,
I’ve the same problem. Insert a Gallery photo into a post show a blanc window.
Reading the messages in this post regarding a plugin conflict i’ve deactivate one bij one my installed plugins. After deactivate the plugin “Replaces the default WordPress editor with CKEditor – Version: 4.0” it solved this problem. I think that most of the WordPress/Gallery users use CKEditor or simular replacement for the WP editor. Now I can insert a thumbnail into a post using the insert NG windows.
Hope this will help solving this problem!
Greetings from the Netherlands, Ruud
