I had my Thunderbolt display mounted on an articulating arm. I decided to move it to a location where the stand would be more appropriate, so I took of the VESA mount. In doing so, I pushed the bracket where either the Stand or the VSA Mount would attach to inside, and it appears to have locked in place. I have tried to release it via a credit card similar to the instructions here http://www.youtube.com/watch?v=eK55yuERL0k (go to 1:15) that I used to install the VESA mount to begin with, but I have not had any luck. I did find some suggestions, but it involved completely tearing apart the monitor, and I'm not sure I want to attempt that if there is another way. Any help would be appreciated!