When I go to system and then accounts all my accounts seem to have disappeared. But when I go to individual accounts in email and contacts etc they still seem partially there. For instance in contacts my accounts are empty and my default account is still there. In calendar it's the same, in emails everything looks fine (there is an account and a default account). I can't add an account in accounts in system. Have you had this before and what do I do? I started noticing it when facebook wouldn't startup, the screen is there but it then stalls.