title: java.lang.RuntimeException: Main thread loop unexpectedly exited, what could be the reason?
body: <p>I am implementing simple thread that passes messages to main UI thread to make changes in UL but sometimes I get this exception and can't figure out its exact reason.</p>
  
  <pre><code>01-22 21:03:50.035: E/AndroidRuntime(18076): FATAL EXCEPTION: main
  01-22 21:03:50.035: E/AndroidRuntime(18076): java.lang.RuntimeException: Main thread loop unexpectedly exited
  01-22 21:03:50.035: E/AndroidRuntime(18076):    at android.app.ActivityThread.main(ActivityThread.java:4426)
  01-22 21:03:50.035: E/AndroidRuntime(18076):    at java.lang.reflect.Method.invokeNative(Native Method)
  01-22 21:03:50.035: E/AndroidRuntime(18076):    at java.lang.reflect.Method.invoke(Method.java:511)
  01-22 21:03:50.035: E/AndroidRuntime(18076):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
  01-22 21:03:50.035: E/AndroidRuntime(18076):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
  01-22 21:03:50.035: E/AndroidRuntime(18076):    at dalvik.system.NativeStart.main(Native Method)
  01-22 21:03:50.109: E/JavaBinder(18076): *** Uncaught remote exception!  (Exceptions are not yet supported across processes.)
  01-22 21:03:50.109: E/JavaBinder(18076): android.util.AndroidRuntimeException: { what=102 when=-14h26m28s942ms obj=android.os.BinderProxy@41347e18 } This message is already in use.
  01-22 21:03:50.109: E/JavaBinder(18076):    at android.os.MessageQueue.enqueueMessage(MessageQueue.java:187)
  01-22 21:03:50.109: E/JavaBinder(18076):    at android.os.Handler.sendMessageAtTime(Handler.java:473)
  01-22 21:03:50.109: E/JavaBinder(18076):    at android.os.Handler.sendMessageDelayed(Handler.java:446)
  01-22 21:03:50.109: E/JavaBinder(18076):    at android.os.Handler.sendMessage(Handler.java:383)
  01-22 21:03:50.109: E/JavaBinder(18076):    at android.app.ActivityThread.queueOrSendMessage(ActivityThread.java:1834)
  01-22 21:03:50.109: E/JavaBinder(18076):    at android.app.ActivityThread.access$200(ActivityThread.java:123)
  01-22 21:03:50.109: E/JavaBinder(18076):    at android.app.ActivityThread$ApplicationThread.schedulePauseActivity(ActivityThread.java:505)
  01-22 21:03:50.109: E/JavaBinder(18076):    at android.app.ApplicationThreadNative.onTransact(ApplicationThreadNative.java:78)
  01-22 21:03:50.109: E/JavaBinder(18076):    at android.os.Binder.execTransact(Binder.java:338)
  01-22 21:03:50.109: E/JavaBinder(18076):    at dalvik.system.NativeStart.run(Native Method)
  </code></pre>