I'm using Beta 5 on both an iPhone 5s and also an iPad Air. On both devices I have the same problem. If I try to launch any PDF or pages files from within mail app, it launches, but only to a white screen. The same happens with pages or PDF files launched from mail. If I try to launch files within Readle Documents (my file viewer of choice) the same happens. The iPad was a fresh install, the iPhone was OTA. The fact that both have the same problem suggests it's an active bug. I just did a reset all settings and the problem persists. Anyone else having same issue and if so, did you manage to correct it ?