[Galaxy S III General] psndna88:
[MENTION=2332422]temasek[/MENTION]

captured logcat for you (very informative AFAIK)

http://d-h.st/Yuk

SUMMARY:

E/AndroidRuntime( 2387): FATAL EXCEPTION: main
E/AndroidRuntime( 2387): Process: com.android.systemui, PID: 2387
E/AndroidRuntime( 2387): java.lang.NullPointerException
E/AndroidRuntime( 2387):	at com.android.keyguard.NotificationHostView.handleAddNotification(NotificationHostView.java:420)
E/AndroidRuntime( 2387):	at com.android.keyguard.NotificationHostView.access$000(NotificationHostView.java:54)
E/AndroidRuntime( 2387):	at com.android.keyguard.NotificationHostView$1.handleMessage(NotificationHostView.java:86)
E/AndroidRuntime( 2387):	at android.os.Handler.dispatchMessage(Handler.java:102)
E/AndroidRuntime( 2387):	at android.os.Looper.loop(Looper.java:136)
E/AndroidRuntime( 2387):	at android.app.ActivityThread.main(ActivityThread.java:5152)
E/AndroidRuntime( 2387):	at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 2387):	at java.lang.reflect.Method.invoke(Method.java:515)
E/AndroidRuntime( 2387):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
E/AndroidRuntime( 2387):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:611)
E/AndroidRuntime( 2387):	at dalvik.system.NativeStart.main(Native Method)
W/ActivityManager( 2467): Process com.android.systemui has crashed too many times: killing!
I/ActivityManager( 2467): Process com.android.systemui (pid 2387) has died.
W/ActivityManager( 2467): Scheduling restart of crashed service com.android.keyguard/.KeyguardService in 0ms
W/ActivityManager( 2467): Scheduling restart of crashed service com.android.systemui/.SystemUIService in 0ms
W/ActivityManager( 2467): Scheduling restart of crashed service com.android.systemui/.ImageWallpaper in 0ms
I/WindowState( 2467): WIN DEATH: Window{42b9d7b8 u0 AppSidebar}
I/StatusBarManagerService( 2467): binder died for pkg=com.android.keyguard
W/WallpaperService( 2467): Wallpaper service gone: ComponentInfo{com.android.systemui/com.android.systemui.ImageWallpaper}
W/WallpaperService( 2467): SystemUI wallpaper disconnected, assuming it's being restarted, not clearing wallpaper.
I/WindowState( 2467): WIN DEATH: Window{42b3b3c0 u0 GestureAnywhereView}
I/WindowState( 2467): WIN DEATH: Window{42afee68 u0 Keyguard}
I/WindowState( 2467): WIN DEATH: Window{426fc958 u0 com.android.systemui.ImageWallpaper}
I/WindowState( 2467): WIN DEATH: Window{4309e8a8 u0 StatusBar}
I/WindowState( 2467): WIN DEATH: Window{42051ba0 u0 NavigationBar}
I/WindowState( 2467): WIN DEATH: Window{42b47820 u0 SearchPanel}
W/InputMethodManagerService( 2467): Window already focused, ignoring focus gain of: android.view.inputmethod.InputMethodManager$1@42917b78 attribute=null, token = android.view.ViewRootImpl$W@428e7398
I/ActivityManager( 2467): Start proc com.android.systemui for restart com.android.systemui: pid=2448 uid=10007 gids={50007, 1028, 1015, 1023, 1035, 1006, 3002, 3001}
I/StatusBarManagerService( 2467): registerStatusBar bar=com.android.internal.statusbar.IStatusBar$Stub$Proxy@43323780
W/ActivityManager( 2467): getAssistContextExtras failed: no resumed activity
E/AndroidRuntime( 2448): FATAL EXCEPTION: main
E/AndroidRuntime( 2448): Process: com.android.systemui, PID: 2448
E/AndroidRuntime( 2448): java.lang.NullPointerException
E/AndroidRuntime( 2448):	at com.android.keyguard.NotificationHostView.handleAddNotification(NotificationHostView.java:420)
E/AndroidRuntime( 2448):	at com.android.keyguard.NotificationHostView.access$000(NotificationHostView.java:54)
E/AndroidRuntime( 2448):	at com.android.keyguard.NotificationHostView$1.handleMessage(NotificationHostView.java:86)
E/AndroidRuntime( 2448):	at android.os.Handler.dispatchMessage(Handler.java:102)
E/AndroidRuntime( 2448):	at android.os.Looper.loop(Looper.java:136)
E/AndroidRuntime( 2448):	at android.app.ActivityThread.main(ActivityThread.java:5152)
E/AndroidRuntime( 2448):	at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 2448):	at java.lang.reflect.Method.invoke(Method.java:515)
E/AndroidRuntime( 2448):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
E/AndroidRuntime( 2448):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:611)
E/AndroidRuntime( 2448):	at dalvik.system.NativeStart.main(Native Method)
W/ActivityManager( 2467): Process com.android.systemui has crashed too many times: killing!
I/WindowState( 2467): WIN DEATH: Window{42cab738 u0 GestureAnywhereView}
I/ActivityManager( 2467): Process com.android.systemui (pid 2448) has died.
W/ActivityManager( 2467): Scheduling restart of crashed service com.android.keyguard/.KeyguardService in 0ms
W/ActivityManager( 2467): Scheduling restart of crashed service com.android.systemui/.SystemUIService in 0ms
W/ActivityManager( 2467): Scheduling restart of crashed service com.android.systemui/.ImageWallpaper in 0ms
I/StatusBarManagerService( 2467): binder died for pkg=com.android.keyguard
W/WallpaperService( 2467): Wallpaper service gone: ComponentInfo{com.android.systemui/com.android.systemui.ImageWallpaper}
W/WallpaperService( 2467): SystemUI wallpaper disconnected, assuming it's being restarted, not clearing wallpaper.
I/WindowState( 2467): WIN DEATH: Window{42756630 u0 Keyguard}
I/WindowState( 2467): WIN DEATH: Window{42f833c8 u0 AppSidebar}
I/WindowState( 2467): WIN DEATH: Window{42903078 u0 com.android.systemui.ImageWallpaper}
I/WindowState( 2467): WIN DEATH: Window{41ebc428 u0 StatusBar}
I/WindowState( 2467): WIN DEATH: Window{428f5800 u0 NavigationBar}
I/ActivityManager( 2467): Start proc com.android.systemui for restart com.android.systemui: pid=2515 uid=10007 gids={50007, 1028, 1015, 1023, 1035, 1006, 3002, 3001}
I/WindowState( 2467): WIN DEATH: Window{4280a3a0 u0 SearchPanel}
W/InputMethodManagerService( 2467): Window already focused, ignoring focus gain of: android.view.inputmethod.InputMethodManager$1@42917b78 attribute=null, token = android.view.ViewRootImpl$W@428e7398
I/StatusBarManagerService( 2467): registerStatusBar bar=com.android.internal.statusbar.IStatusBar$Stub$Proxy@4277f160
W/ActivityManager( 2467): getAssistContextExtras failed: no resumed activity

this reoccured for me after reactivating lockscreen notifications, disabled again now