Summary: The method attentionClassDumpUser:yesItsUsAgain:althoughSwizzlingAndOverridingPrivateMethodsIsFun:itWasntMuchFunWhenYourAppStoppedWorking:pleaseRefrainFromDoingSoInTheFutureOkayThanksBye: doesn't do anything. Steps to Reproduce: 1) Use class-dump to add the following header to your project: /* * Generated by class-dump 3.1.1. * * class-dump is Copyright (C) 1997-1998, 2000-2001, 2004-2006 by Steve Nygard. */ #import <UIKit/UIViewController.h> @interface UIViewController (UIViewControllerClassDumpWarning) - (void)attentionClassDumpUser:(id)fp8 yesItsUsAgain:(id)fp12 althoughSwizzlingAndOverridingPrivateMethodsIsFun:(id)fp16 itWasntMuchFunWhenYourAppStoppedWorking:(id)fp20 pleaseRefrainFromDoingSoInTheFutureOkayThanksBye:(id)fp24; @end 2) Call attentionClassDumpUser:yesItsUsAgain:althoughSwizzlingAndOverridingPrivateMethodsIsFun:itWasntMuchFunWhenYourAppStoppedWorking:pleaseRefrainFromDoingSoInTheFutureOkayThanksBye: from your code. Expected Results: Something dramatic. Flames shooting out of the dock connector would be nice. Actual Results: Nothing. I must admit I was disappointed. Regression: This feature is new to 3.0 SDK. You've brought a little joy into the lives of many iPhone developers with the addition of this category on UIViewController. Thank you. Notes: How can I break my code with your code if your code doesn't do anything that can break my code? I demand a refund.