Sorry to revive an older post, but maybe my post will help future visitors.
(intro - I'm usually in the Android forums, but my wife has an iPhone, so I just logged in here with the same screen name. So hopefully I won't be viewed as a traitor :P)
Anyway, I digress....
My wife's Lifeproof case developed the same problem as the Original Poster. After inspecting it and playing around with the case, it appears the clear screen on the case somehow warped and no longer was sitting flat against the screen of the iPhone. I don't know what caused it or how it happened. Anyway I initially contacted Lifeproof about the issue on Wednesday night (July 11) around Midnight. Thursday morning I had already been replied to asking for further information. I replied with the info they were asking for, and by Friday evening (July 13)I recieved 2 emails from them. One was from the service rep I was dealing with (Jen S -- super helpful and amazing), and the other was from their shipping dept informing me that a replacement was being shipped out.
The product itself is amazing (a little expensive, but worth it) and the customer care is TOP NOTCH, far better then I was expecting.
So if you're thinking about getting a Lifeproof case, just do it. In my opinion, it has better protection then the Otterbox Defender, in a smaller package, AND its waterproof -- and awesome customer care on top of it!