Sorry to Necro but i have been having this issue for quite some time, but i managed to fix it! It was the same as the OP issue with the avatar update, even though i am already on 17511, i installed this update to usb and let it install, and it fixed my issue straight away.
Hope this helps:
https://www.4shared.com/rar/5Yvm9_58da/17511_Atualizao.html