title: Google cloud messaging registering and unregistering
body: <p>I am developing an app using the new Google Cloud Messaging Framework. We know that once we register our app we get a registration id. But what happens when the user unistalls the app through the device for a number of times and re installs again and again (there is no new notification sent till now). Now with many installations done google might return several new registration ids and now all the ids are saved in the app database. 
  If there is a notification to be sent it would be sent to all the ids previously saved also. Now my problem is that i think google is sending the notification to all the previous ids(so i get multiple notifications on the same device).</p>
  
  <p>I hope i made my question clear and is there a solution to this.</p>