As seems to be typical, when I post an issue to an ESRI forum or log a bug report, it magically goes away. Granted, we did upgrade our back-end ArcGIS Server from 10.1 to 10.2 as well, so perhaps that did the trick. Needless to say, for now the Collector crashing in iOS is gone, at least for now. I like many others I'm sure am very interested in the upcoming Collector update. Is there a more concrete release date for it now? Earlier ESRI blogs had it pegged at late September.