I love my new iPhone 5 but when listening to music with the iPhone in my pocket the volume will decrease on its own. I can duplicate this every time with a set of klipsch earbuds equipped with volume control. The same earbuds did not do this with my iPhone 4. It also won't do this if I'm holding the iPhone in my hand while walking. Only when it's in my pocket and I'm walking somewhere. Can someone else confirm or deny this flaw with any sets of earbuds? Or did I just get a flawed device?