when i first got my macbook i noticed that when it was shut, the top and the bottom were not exactly flush...what i mean is that they didnt line up properly. i.e. the top right bit stuck out a few milimetres, and the top left top was in a few mm. It was never a big deal to me & its hardly noticable (had my macbook nearly a year, so really dont care about it). But what im wondering is how common is this? Am i a rare case??