title: Wierd thing, app works well on iphone 4s & ipad, but crashed on iphone 4
body: <p>I've submitted my app to appstore for review and is refused as follows:</p>
  
  <blockquote>
    <p>We found that your app crashed on iPhone 4 running iOS 5.1.1, which is
    not in compliance with the App Store Review Guidelines. Your app
    crashed on launch on both Wi-Fi and cellular networks.</p>
  </blockquote>
  
  <p>And this is the attached crash log:</p>
  
  <pre><code>Incident Identifier: 65E8D233-2F02-4545-85C9-74CA4A346051
  CrashReporter Key:   5f5257827e93649c799893055b12d3d61c937314
  Hardware Model:      iPhone3,1
  Process:         iman360 [42785]
  Path:            /var/mobile/Applications/EA2B491A-194D-4669-ADF7-721593D2B14F/iman360.app/iman360
  Identifier:      iman360
  Version:         ??? (???)
  Code Type:       ARM (Native)
  Parent Process:  launchd [1]
  Date/Time:       2012-08-09 13:41:37.107 -0700
  OS Version:      iPhone OS 5.1.1 (9B206)
  Report Version:  104
  
  Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
  Exception Codes: KERN_PROTECTION_FAILURE at 0x2fdfe6e0
  Crashed Thread:  0
  
  Thread 0 name:  Dispatch queue: com.apple.main-thread
  Thread 0 Crashed:
  0   ???                             0x2fdfe6e0 0 + 803202784
  1   iman360                         0x00036ba2 -[ComicCatController     refreshWithActionHandlerExeced:] (ComicCatController.m:216)
  2   iman360                         0x00036b0c -[ComicCatController refresh] (ComicCatController.m:207)
  3   iman360                         0x0002e682 -[TabComicCityViewController showSegTabView:] (TabComicCityViewController.m:312)
  4   iman360                         0x0002dcbc -[TabComicCityViewController segmentedViewValueChanged:] (TabComicCityViewController.m:96)
  5   CoreFoundation                  0x372ee3f6 -[NSObject performSelector:withObject:withObject:] + 46
  6   UIKit                           0x31083e00 -[UIApplication sendAction:to:from:forEvent:] + 56
  7   UIKit                           0x31083dbc -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 24
  8   UIKit                           0x31083d9a -[UIControl sendAction:to:forEvent:] + 38
  9   UIKit                           0x31083b0a -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 486
  10  iman360                         0x00019598 -[Iman360SegmentedView moveThumbToIndex:animate:] (Iman360SegmentedView.m:360)
  11  iman360                         0x00017ab4 -[Iman360SegmentedView willMoveToSuperview:] (Iman360SegmentedView.m:117)
  12  UIKit                           0x3106b502 -[UIView(Internal) _addSubview:positioned:relativeTo:] + 390
  13  UIKit                           0x3106b370 -[UIView(Hierarchy) addSubview:] + 24
  14  iman360                         0x0002d996 -[TabComicCityViewController viewDidLoad] (TabComicCityViewController.m:49)
  15  UIKit                           0x310a1c84 -[UIViewController view] + 160
  16  iman360                         0x0001c86a +[ViewControllerManager initGlobalContentBgImgForViewController:] (ViewControllerManager.m:43)
  17  iman360                         0x0000422c -[Iman360ViewControllerBase init] (Iman360ViewControllerBase.m:25)
  18  iman360                         0x0002b8ce -[IndexTabViewControllerBase initWithIndexViewController:] (IndexTabViewControllerBase.m:19)
  19  iman360                         0x00004706 -[IndexViewController viewDidLoad] (IndexViewController.m:58)
  20  UIKit                           0x310a1c84 -[UIViewController view] + 160
  21  UIKit                           0x310a045a -[UIWindow addRootViewControllerViewIfPossible] + 38
  22  UIKit                           0x31224774 -[UIWindow setRootViewController:] + 332
  23  iman360                         0x0001c7da +[ViewControllerManager switchToViewController:] (ViewControllerManager.m:32)
  24  iman360                         0x0001c60a -[LoadingViewController onBackgroundJobFinishedWithUpdateInfo:] (LoadingViewController.m:165)
  25  CoreFoundation                  0x372f31f4 -[NSObject performSelector:withObject:] +   36
  26  Foundation                      0x37c0e740 __NSThreadPerformPerform + 344
  27  CoreFoundation                  0x37368acc __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 8
  28  CoreFoundation                  0x37368298 __CFRunLoopDoSources0 + 208
  29  CoreFoundation                  0x3736703e __CFRunLoopRun + 646
  30  CoreFoundation                  0x372ea49e CFRunLoopRunSpecific + 294
  31  CoreFoundation                  0x372ea366 CFRunLoopRunInMode + 98
  32  GraphicsServices                0x33aa9432 GSEventRunModal + 130
  33  UIKit                           0x31096cce UIApplicationMain + 1074
  34  iman360                         0x00004d5c main (main.m:23)
  35  iman360                         0x00002e60 0x1000 + 7776
  
  Thread 0 crashed with ARM Thread State:
  r0: 0x2fdfe6bc    r1: 0x2fdfe6bc      r2: 0x2fdfe6e0      r3: 0x00000000
  r4: 0x0015d980    r5: 0x00000001      r6: 0x00059384      r7: 0x2fdfe6e0
  r8: 0x00059388    r9: 0x0000000e     r10: 0x00153da0     r11: 0x314490ab
  ip: 0x000249a1    sp: 0x2fdfe6e0      lr: 0x000249c1      pc: 0x2fdfe6e0
  cpsr: 0x200f0010
  </code></pre>
  
  <p>But I've tested it on my iphone 4s &amp; ipad, and it works well there. At first I thought it might be I am dereferencing a null pointer but <strong>KERN_PROTECTION_FAILURE at 0x2fdfe6e0</strong> shows it is not so. Any idea on this?</p>