I have a ATT 920. Beginning Friday late afternoon the app Header Tiles stopped staying open. Then Saturday afternoon Remembereel stop connecting to OneDrive. Then my friend who also has an ATT 920, called me to see if my Facebook had stopped working. I've done a soft boot, when that didn't work I did a complete reset (the phone had become glitchy since the Cyan update so this gave me 2 reasons to do it). I reinstalled Header Tiles and Remembereel, and she has reinstalled Facebook, but they all keeps closing. It acts like there is a file conflict, so it closes. In searching to see if anyone was having the same problem I did notice postings over the last 3 days about random apps not working and soft resets and reinstalls not working. It could be isolated incidents, or it could be the symptoms of a common denominator.