UIResponder differences from iOS4-iOS5

I found a curious difference in behavior running my app on an iOS4 device vs. running the same app on an iOS5 device. On iOS4, if I set a view (or really just a UIResponder) to be firstResponder, and then later, resignFirstResponder, there is no defined firstResponder; whatever was

UIFont system font on Retina displays

On Retina display devices, such as the 3rd generation iPad, I found that the system font returned by [UIFont systemFontOfSize:] is a font whose family name is not included in the array of font families returned by [UIFont familyNames]. The family name that is returned is .HelveticaNeueUI

Canceling all touches

.) Thanks in advance for any advice. Regards, Jon Brooks ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help

Question regarding popoverControllerDidDismissPopover: delegate method

will be fine? Is this a bug that the popover is still fielding a touch after the delegate method popoverControllerDidDismissPopover: is called? Thanks in advance for any advice. Jon Brooks ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do