XCode 5 warnings

XCode 5 syntax checking is displaying a new warning on lines 391 and 416 of CKRefreshControl.m 

"Incompatible pointer types returning 'UIRefreshControl *' from a function with result type 'CKRefreshControl *'"

solved this by typecasting 'UIRefreshControl *' as 'id' in +appearance and +appearanceWhenContainedIn: class methods ... 

Xcode 5 no longer displays the warning