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I am having an issue with the video popups on the user profile pages. When a video is clicked the page just reloads.
Also, the profile avatar can't be changed, when you upload an image to change it the image loads 100% it just won't let you do anything after it's been uploaded.
I was thinking they might be related but I don't have any issues with the profile pictures, they seem to work just fine?
I've had the same issue on Chrome, IE 10, and Firefox.
for video popups you must set it from jomsocial backend > videos > settings > open video in modal window.
and I tried it at your site, I dont have any issue with it:
and about avatar, there is no issue. please open new topic about it: