They're usually good with returns and replacements. You'll have a hard time proving it's not due to your clumsiness unless it's a known issue with them.
__________________
Great story; Compelling and rich.
mine cracked there after a few month well a bit had actually chipped off, i had to ring apple and get a repair code then take to a authorised apple repair centre and they replaced the whole bit in about an hour, was hoping for a new macbook
White? Known problem if so. Mine (actually our lass' now; I got sick and got the 13" Pro) is on to its third bezel and fourth top casing - thank fuck for AppleCare.