Hate to bring up an old thread, but last night I suffered the same thing, dropped it (in the pouch) in ASDA car park.
Annoyingly, it fell to the ground open end first so it didn't protect it much, and I suffered a tiny bit of damage (honestly, considering it must have been a 4ft drop) which for about 5 mins stopped me from opening the battery cover. Fixed it with the amazing tool known as a finger nail
Used a nail file to remove the burr and all is well (as it could be after dropping a £412 mobile).
Is that a design flaw? No.
Am I a spacker with no grip? Looks like it.
Have I given in and ordered a 'proper' case for it now? Yes.