Code:
Content visible to verified customers only.
There is not ajax on the members profile that I am seeing
There is no way to go backwards on the exif thing unless you code something yourself. We support the code as it is written by the developer.
As far as the next prev images they never passed a medium or large size every they have always been a link to the photo period and hense if you click it your taken to that photo. If the photo has a medium size it should and is correctly shown.