If you’re on Preview mode and you clicked linkback button, it will not work. But if you remove “?percmobilepreview=true” from URL, then click linkback button, it does work.
I am not sure if this is bug or not… I used this a lot when I have many preview pages going on in draft mode…
Here’s the video of what’s happening: http://www.sfcollege.edu/ccs/dev/v/link-back.zip