Tapping the Notication button in Facebook app iOS 8.2 results in problem with all buttons after clicking on the expanded drop down list of Notication comments. Seems to kill functionality of the buttons for Messenger app, friends, and the ability to return to home page and the settings list. Can get around it by clicking on small v on top right and click on settings in the drop down then can get back to settings list icon on the left top corner of page.