My iPhone is still running fine after I did the iTunes downgrade to 7.7.0 about a week ago. I had a scare today when BoxOffice (now called "Now Playing") exhibited the same behavior when I had the issue apps closing immediately after loading a week ago. However it seemed to be just an issue with BoxOffice since I deleted it and then redownloaded it from the App Store on the phone. The app is now running ok.