On iPhone 5, everything in the activity sheet expected shows up, and everything works as expected.
On iPad 2, 3, and mini, only iOS Mail icon shows up on the top row (missing social applications), and when one presses mail, share is immediately completed with ShareCompletedEventArgs.completed = false, without going to mail message screen. The bottom row in the activity sheet – save image, assign to contacts, etc. work as expected.
I am sharing Texture2D.
Is there a known bug, or, what could have gone wrong?