I've seen 2 or 3 other posts but it is rare. It is probably something to do with assembly or even the button, but if all else is fine, honestly I wouldn't bother returning, there are far bigger issues you could end up with. Now if you have some other issue more pressing, then it might make sense to exchange. Just my opinion.
Disclaimer: No touchscreens
were harmed nor injured during the creation of this post. GPS
units were all treated ethically and humanely.
Signed: People against misbehaving Nexus 7 2013s