My Maxx doesn't creak at all? I would expect the regular razr to creak a little bit. It is so thin that there isn't a lot of structural support. I think the battery may be helping the maxx stay so rigid. Something you may wanna keep in mind though, is the Kevlar. The material properties for Kevlar indicate a level of flex, more so than say, aluminum, or carbon fiber. This flex makes the phone more durable, less brittle and more impact resistant than Aluminum, or CF.
Sorry I went off on a bit of a tangent. Back to your original statement... If your phone has moving panels or creaking parts, maybe you should exchange. The 3 Razr Maxx phones I have dealt with (mine, my wifes, and my cousins) have all been quite solid. I would hope most are like ours but maybe we just lucked out. Also, my wife owned a Droid X2 before the maxx and that thing was rock solid as well. So I guess speaking from my own personal experiences with Moto products, I do feel like they are superb. I am yet to own anything bad from Moto.
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