Open the feed on the iOS app v 220.127.116.11 and tap any question (the blog post and things that open in an external browser are safe). I'm on an iPhone 5 iOS 7.1.2 (11D257).
App crashes on me every time. SIGABRT in the log on thread 0 with 0
Let me know if you'd like the text of the crash reports or a specific item if the crash is not obvious to the developers. I'm also getting the crash in any of the main browsing windows when tapping on a specific question.
Oddly, going in through the achievements, I can view questions from that avenue, but the majority of the app causes crashes when looking at questions on the half dozen of sites I've checked before submitting this bug report.