title: Trouble with appwidget appWidgetIds (real and phantom instances of widget)
body: <p>colleagues!  My problem is: I`ve got an App Widget with Configuration Activity(min SDK - 2.1), 
    it works properly but sometimes it begins working more slowly. I logged and found out that before 
    updating my App Widget method onUpdate received an array of App Widget Ids</p>
  
  <pre><code>  @Override
      public void onUpdate(Context context, AppWidgetManager appWidgetManager,
              int[] appWidgetIds) {
          Log.d("onUpdate", Arrays.toString(appWidgetIds));
  </code></pre>
  
  <p>But the truth was that I had only two instances of App Widget on Home Screen but the lenth of array
  is more then 2 (two): 4, sometimes 5 or 6. How can it be so? The reason of slowness of my AppWidget Updates
  is that I have to call onUpdate-method for all ids but some ids (as one said "phantom widgets") are not 
  real and correct.</p>
  
  <p>Maybe, someone have encountered with such problem and would help me to figure out how to handle only real 
  app widget ids.</p>
  
  <p>P.S. Uninstalling and then reinstalling app widget (and after that all the ghost widgets were gone) - are not
  the proper solving of my problem. I`d like to controll ghost and real widget programmatically.</p>
  
  <p>Has someone any idea how to fix this bug?</p>