I installed the recent beta of the JCE’s Mediabox because Ryan is working on a responsive version. It is working well; however, I was having an issue making the Popup Icon not show. I set it to not show, but it showed up anyways.
I was able to get it to not show by adding the following to my CSS.
I discovered you can disable this globally by going to Extensions >> Plugins >> Mediabox 2 >> Options Tab. Set Zoom/Popup Icons to No.
I hope this helps some else out there…