Problem is my aluminum MacBooks lid opens up very easily when carrying it in a laptop messenger bag. It seems like the magnets aren't strong enough to keep the lid closed while laptop is in vertical position in my laptop bag. I did not have the same problem with the white MacBook so I ended up taking it to service. In Apple service point they agreed that the magnetic latch was definitely more loose than on white MacBooks and even slightly more loose than on some of other aluminum books they had there for repair. They are going to replace the whole screen part of the MacBook and see if it gets any better. Now I wonder if anyone else has the same problem with their aluBook?