When I put my MB at my bag (laptop bag) it has the weight of all my books on top of it (not a lot of books, only 2 or maybe 3 and some other things like calculator, note pads, etc). And I notice that that the lid gets like kind of stuck with the magnets, it's harder to open the lid. Is this happening to all of you? Should I get worried by this? Also, is there any other risk of having the weight of 2-3 books on top of my MB? Before the MB I had a Thinkpad (a big one), which resisted a lot. Thanks, Roco.