Ok i got the summer 2009 white macbook. Loving the computer, form factor, etc. I've started bringing it to school with me but i'm afraid of it breaking on me in my backpack because i have a lot of textbooks with me. I slipped it in a cover and put the macbook in its own pocket (its a laptop backpack) but i'm still worried. i press on the top and the computer creaks a tad bit. Should i not put it in my backpack full of texbooks or am i just too paranoid of it breaking?