Hi all, I'm a new owner of a Vivotab RT. So far this machine is awesome. One thing I notice though is that on the upper right corner of the tablet, near the headphone jack, I can squeeze the corner (front and back together) and it makes a "noise". The noise sounds like pressing two plastic together but not "hooking" the two pieces together when you let go. The other three corner doesn't have this symptom and feels solid. Should I worry about this and if its trouble claiming warranty on this issue?