I couldn't see any answers really regarding this, when docked, there seems to be some play in the hinge of the dock so even though secure, the screen wobbles around a bit. I have had a similar thing with a laptop and the hinge needed tightening however I'm not prepared to void my warranty and open it up!!
I have only just noticed it and I'm pretty sure it didn't used to be like this?? It makes the prime feel less solid and does interfere a little when I have the TFP on my knee and the screen quite forward as it rocks about.
If I have to RMA it, would I be able to just send the dock or would they want it all!? (UK version bundled with dock) I can't live without my prime now!!