Is it normal for the hard drive to be loose for example when I take the cover off and touch the HD it is a bit loose when I pull the plastic tab and I can hear it move a bit when I am carrying it sometimes. I have ignored this as it doesn't really bother me but the other day I was looking at my friends unibody Macbook and his HD was really tight and didn't move. But his is smaller this its a macbook and not a mbp. I tried tightening the screws but they don't seem to want to move anymore. thanks UPDATE they have offered to replace the main casing but is it sate as it seems like a big job. So l just called this and they said its the only way as exchanges are only allowed within 2 weeks and l have had mine for 8 weeks.