Problem with point and shoot camera?

I have a Nikon coolpix s6300, Every time I took some photos, some photos must be destroyed, It looks like this (image link), I use a class 4 sony 4 GB memory card.
whats the problem with my camera? or is it the problem with memory card?
Added (1). My camera is new. I remove the memory card, took some photos. When the photo is stored in a camera's memory, none of the photos are destroyed.

I can't understand if it is a shutter problem or the memory card problem ?

См. статью: Problem with point and shoot camera?