On my FCB's, where the CF portion of the arm joins into the red hinge part it has become loose. There is no adjustment for this portion and my second pair nor any pair I've checked out in a store have this. It's odd because I have worn them twice for about 20 minutes each time so it's not abuse, but if it's just glue preventing them from wiggling that's going to become an issue for a lot of people. I reallllllly don't want to send them in for warranty but it looks like I have no choice. Here is a stock pic to show the area I am talking about; has anyone else noticed this?