Since the update yahoo Mail has been messed up. I kept getting a prompt to enter the password for my business account when I did I got a message " "my email name" is already added. This Yahoo! account has already been added to your iphone" The account was there but all of the switches(mail, contacts, calendars...) were grayed out. I deleted that account and tried to re-add it and got the same message as above. Then I get an email from yahoo stating "we noticed that your yahoo account was added to ios. I you did this you are all set". WTF!!!