[Samsung Galaxy S (4G Model)] Theraze:
Well, here's my logcat:

I/ActivityManager( 4108): START u0 {act=android.intent.action.MAIN cmp=com.android.settings/.SubSettings (has extras)} from pid 16417
W/Resources(16417): Converting to string: TypedValue{t=0x10/d=0x1 a=-1}
D/AndroidRuntime(16417): Shutting down VM
W/dalvikvm(16417): threadid=1: thread exiting with uncaught exception (group=0x40b15888)
E/AndroidRuntime(16417): FATAL EXCEPTION: main
E/AndroidRuntime(16417): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.settings/com.android.settings.SubSettings}: java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String
E/AndroidRuntime(16417): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2308)
E/AndroidRuntime(16417): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2358)
E/AndroidRuntime(16417): at android.app.ActivityThread.access$600(ActivityThread.java:153)
E/AndroidRuntime(16417): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247)
E/AndroidRuntime(16417): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(16417): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime(16417): at android.app.ActivityThread.main(ActivityThread.java:5220)
E/AndroidRuntime(16417): at java.lang.reflect.Method.invokeNative(NativeMethod)
E/AndroidRuntime(16417): at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime(16417): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794)
E/AndroidRuntime(16417): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:561)
E/AndroidRuntime(16417): at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:110)
E/AndroidRuntime(16417): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(16417): Caused by: java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String
E/AndroidRuntime(16417): at android.app.SharedPreferencesImpl.getString(SharedPreferencesImpl.java:224)
E/AndroidRuntime(16417): at android.preference.Preference.getPersistedString(Preference.java:1409)
E/AndroidRuntime(16417): at android.preference.ListPreference.onSetInitialValue(ListPreference.java:278)
E/AndroidRuntime(16417): at android.preference.Preference.dispatchSetInitialValue(Preference.java:1325)
E/AndroidRuntime(16417): at android.preference.Preference.onAttachedToHierarchy(Preference.java:1137)
E/AndroidRuntime(16417): at android.preference.PreferenceGroup.addPreference(PreferenceGroup.java:163)
E/AndroidRuntime(16417): at android.preference.PreferenceGroup.addItemFromInflater(PreferenceGroup.java:104)
E/AndroidRuntime(16417): at android.preference.PreferenceGroup.addItemFromInflater(PreferenceGroup.java:45)
E/AndroidRuntime(16417): at android.preference.GenericInflater.rInflate(GenericInflater.java:488)
E/AndroidRuntime(16417): at android.preference.GenericInflater.inflate(GenericInflater.java:326)
E/AndroidRuntime(16417): at android.preference.GenericInflater.inflate(GenericInflater.java:263)
E/AndroidRuntime(16417): at android.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:269)
E/AndroidRuntime(16417): at android.preference.PreferenceFragment.addPreferencesFromResource(PreferenceFragment.java:285)
E/AndroidRuntime(16417): at com.android.settings.DevelopmentSettings.onCreate(DevelopmentSettings.java:236)
E/AndroidRuntime(16417): at android.app.Fragment.performCreate(Fragment.java:1673)
E/AndroidRuntime(16417): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:854)
E/AndroidRuntime(16417): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1057)
E/AndroidRuntime(16417): at android.app.BackStackRecord.run(BackStackRecord.java:682)
E/AndroidRuntime(16417): at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1435)
E/AndroidRuntime(16417): at android.app.Activity.performStart(Activity.java:5223)
E/AndroidRuntime(16417): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2271)
E/AndroidRuntime(16417): ... 12 more
W/ActivityManager( 4108): Force finishing activity com.android.settings/.SubSettings
W/ActivityManager( 4108): Force finishing activity com.android.settings/.Settings

Looks like this is the problem:

E/AndroidRuntime(16417): Caused by: java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String

Somehow, I've got a boolean that's being evaluated as a string. Great. :)