@Rattigan,
Those are bold claims. Do you have any research and evidence to support them?
Anyway, have a look at this page for some contemporary examples of evolution in action: http://listverse.com/2011/11/19/8-examples-of-evolution-in-action/
Pay close attention to number 5. If a change in diet can change jaw size and biting force over some generations, why can't the same happen to the shape of teeth?
I suggest you research evolution from sources other that creationist websites. You'llama be surprised how much sense it actually makes; I know I was.
Remember, almost all of us here used to be die hard creationists. Ever wonder why some of us changed our minds?