New acrylic tank is wobbly...?

I just got a new acrylic tank. It does not have water in it yet. Its on a stand that has a solid wood top so it should be ok for acrylic. The acrylic tank has these little round contact points but I noticed if you tip it - it wobbles - like one of the contact points is shorter or longer. My friend said it is warped and should straighten out once it gets filled. Is there any possibility that instead of straightening out it will crack?