ok so just to say i havnt jailbroken it, and it is only 3 months old,its a 3gs 32gig. o.s 4.1------- 3 apps keep going invisable 1 at a time it switches everytime i go off the page and come back. the 3 apps are contacts, camera and voice memos, they all work still but they just go invisible. anyone know wots going on?