U3DXT SocialXT.Share Crash on iOS 8

I'm updating an app for iOS 8 and getting a consistent crash on iPad when building with Xcode 6 using the U3DXT Social Activity Sheet. I'm guessing this is a U3DXT bug, not directly a Unity bug, but this seems to be the place for U3DXT support?

To Repro:

• Build U3DXT Kitchen Sink Demo for iOS with Unity 4.5.4p1 on OS X 10.9.5

• Open project in Xcode 6.0 or 6.0.1

• Build on iPad Mini Retina with iOS 8

• Tap "Social Networking" > "Activity Sheet"

• Crash Log says: Terminating app due to uncaught exception 'NSGenericException', reason: 'UIPopoverPresentationController (<_UIAlertControllerActionSheetRegularPresentationController: 0x19134ad0>) should have a non-nil sourceView or barButtonItem set before the presentation occurs.'

Notes:

• Crash does not occur when building with Xcode 6 but using iPhone 5 with iOS 8.

• Crash does not occur when building with Xcode 5.

• When working with build via Xcode 5, activity sheet looks odd on iOS 8 iPad (see attached)