Last modified: 2014-04-17 22:55:52 UTC
As a logged in user on http://en.wikipedia.beta.wmflabs.org/ edit any page. Choose "Insert Media" Search for something e.g. "San Francisco" Select a media image. Insert Media interface does nothing, but should offer a Save and then Review your changes options.
This issue got fixed by :https://gerrit.wikimedia.org/r/123803 Verified in betalabs.
verified the fix on mw.org
Verified the fix on production