Well the OP was not doing anything other than stating the facts. He did not make a big deal out of it, in fact quite the contrary. Notwithstanding of course that he has probably got enough material from this thread so far for a 20 minute routine, we should not ignore the very sane analysis provided earlier by CanadaRAM. Namely why is it wobbling and what does it mean. I'm not familar with these machines being an emac kind of guy myself, so I don't know if they come with rubber feet and one is missing.
If they don't come with rubber feet then one is certainly going to wonder how a sturdy aluminium case has come to be out of square by a 1/4". The fact of the wobble is far less important that was led to the situation to develop in the first place.