It seems something is going wrong with UIActivityIndicatorViews in iOS 8.4...
How it looks on 8.2:
How it looks on 8.4:
If you look closely you'll see that on iOS 8.4 it seems to be rendering at non-retina scale! The same also seems to be happening to badge views on the tab bar, try setting the badgeValue on a UITabBarItem.
Does anyone know if there is a workaround to get it to draw properly? I know it's only a minor bug but it looks kinda crappy :(
