I don't know how typical this on the Series 2, but the long side button my stainless Series 2 I just received is incredibly loose. Just rolling my finger over it causes it to rattle like crazy. It's so loose that after I press it in and let go, you can hear it "rattle out" as it comes back out. I can also hear it if I shake my hand around. I'm not sure if this a byproduct of the new waterproofing, or if this is normal. My 1st gen Apple Watch doesn't have this issue at all.. Any thoughts from other Series 2 owners?