Wrong forum. He's asking about IOS 8. I have a 5s with 8.0.2 not having a problem here.
I just wanted a MOD to move this to the proper forum so that it gets better exposure to folks who might have an answer for him. I"ve had a couple of apps crash out on IOS 8, mostly because they haven't been updated yet. All of the Apple apps are working fine, including Safari.