Hello there. I've just replaced my good ol' 3GS to 4S(God, it's blazing fast), but in 3GS I had more-like clicky pressure when pushing home button. In 4S home button has more, more softly click than 3GS. And volume buttons - volume down is fine, volume up requires more pressure and doesn't have clicky sound. And when you click on the edge of volume up, it hardly catches. It is normal?