This is so common it's funny. I don't even think there is a point to going through the stress of dealing with their horrid callcentre to arrange repairs (if they don't accuse you of dropping it) as it's more than likely just going to crack again. I'd be waiting until a couple of months is left on the warranty and hopefully by then the repair would actually rectify a known problem. But that's just me, and anyway I'm popping my 770 on ebay shortly, I don't want to have to go through Nokia support ever again.