[Samsung Galaxy Nexus] lukemovement1:
ye im getting this error as well when trying to change the resolution of the video camera.

E/AndroidRuntime(30745): FATAL EXCEPTION: main
E/AndroidRuntime(30745): java.lang.IllegalArgumentException: The observer is null.
E/AndroidRuntime(30745):	at android.database.Observable.unregisterObserver(Observable.java:64)
E/AndroidRuntime(30745):	at android.widget.BaseAdapter.unregisterDataSetObserver(BaseAdapter.java:42)
E/AndroidRuntime(30745):	at android.widget.AbsListView.onDetachedFromWindow(AbsListView.java:2610)
E/AndroidRuntime(30745):	at android.view.View.dispatchDetachedFromWindow(View.java:11967)
E/AndroidRuntime(30745):	at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2532)
E/AndroidRuntime(30745):	at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2530)
E/AndroidRuntime(30745):	at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2530)
E/AndroidRuntime(30745):	at android.view.ViewGroup.removeViewInternal(ViewGroup.java:3616)
E/AndroidRuntime(30745):	at android.view.ViewGroup.removeViewInternal(ViewGroup.java:3591)
E/AndroidRuntime(30745):	at android.view.ViewGroup.removeView(ViewGroup.java:3523)
E/AndroidRuntime(30745):	at com.android.camera.VideoModule.dismissPopup(VideoModule.java:2827)
E/AndroidRuntime(30745):	at com.android.camera.VideoModule.dismissPopup(VideoModule.java:2817)
E/AndroidRuntime(30745):	at com.android.camera.VideoController.onPreferenceClicked(VideoController.java:175)
E/AndroidRuntime(30745):	at com.android.camera.ui.MoreSettingPopup.onItemClick(MoreSettingPopup.java:173)
E/AndroidRuntime(30745):	at android.widget.AdapterView.performItemClick(AdapterView.java:298)
E/AndroidRuntime(30745):	at android.widget.AbsListView.performItemClick(AbsListView.java:1102)
E/AndroidRuntime(30745):	at android.widget.AbsListView$PerformClick.run(AbsListView.java:2751)
E/AndroidRuntime(30745):	at android.widget.AbsListView$1.run(AbsListView.java:3425)
E/AndroidRuntime(30745):	at android.widget.AbsListView.onDetachedFromWindow(AbsListView.java:2642)
E/AndroidRuntime(30745):	at android.view.View.dispatchDetachedFromWindow(View.java:11967)
E/AndroidRuntime(30745):	at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2532)
E/AndroidRuntime(30745):	at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2530)
E/AndroidRuntime(30745):	at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2530)
E/AndroidRuntime(30745):	at android.view.ViewGroup.removeViewInternal(ViewGroup.java:3616)
E/AndroidRuntime(30745):	at android.view.ViewGroup.removeViewInternal(ViewGroup.java:3591)
E/AndroidRuntime(30745):	at android.view.ViewGroup.removeView(ViewGroup.java:3523)
E/AndroidRuntime(30745):	at com.android.camera.VideoModule.dismissPopup(VideoModule.java:2827)
E/AndroidRuntime(30745):	at com.android.camera.VideoModule.dismissPopup(VideoModule.java:2817)
E/AndroidRuntime(30745):	at com.android.camera.VideoController.onPreferenceClicked(VideoController.java:175)
E/AndroidRuntime(30745):	at com.android.camera.ui.MoreSettingPopup.onItemClick(MoreSettingPopup.java:173)
E/AndroidRuntime(30745):	at android.widget.AdapterView.performItemClick(AdapterView.java:298)
E/AndroidRuntime(30745):	at android.widget.AbsListView.performItemClick(AbsListView.java:1102)
E/AndroidRuntime(30745):	at android.widget.AbsListView$PerformClick.run(AbsListView.java:2751)
E/AndroidRuntime(30745):	at android.widget.AbsListView$1.run(AbsListView.java:3425)
E/AndroidRuntime(30745):	at android.os.Handler.handleCallback(Handler.java:725)
E/AndroidRuntime(30745):	at android.os.Handler.dispatchMessage(Handler.java:92)
E/AndroidRuntime(30745):	at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime(30745):	at android.app.ActivityThread.main(ActivityThread.java:5202)
E/AndroidRuntime(30745):	at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(30745):	at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime(30745):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:799)
E/AndroidRuntime(30745):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566)
E/AndroidRuntime(30745):	at dalvik.system.NativeStart.main(Native Method)
W/ActivityManager( 389): Force finishing activity com.android.gallery3d/com.android.camera.CameraLauncher