So I was in checking out the battery covers on some late '08 display models today....they only had the MBs in stock. I've been hearing complaints about the 'give' on the MBPs so I decided to check them out. Each MB was rock solid, only one had a tiny bit of give but I had to really apply pressure to get it to wiggle a bit. The other unit was *tight* as can be. Did I just get lucky or are most units fine? ...perhaps there's only a small percentage that wiggle and they complain the most (makes sense) .....or is it because the MBs are smaller so they are more stable? Perhaps the design is flawed w/ a 15" machine but works on a 13"? ....or are the majority of MBPs solid too?