title: ListPicker expanded mode needs double tap to select WP7
body: <p>This issue sounds very similar to the others suggested, but I don't see it mentioned elsewhere. </p>
  
  <p>My ListPicker is hosted inside a scrollviewer and a few items are added to it in design. since it's just 5 items (Title), it needs to expand - but it doesnt seem to. I need to manually regiter an event on Tap to Open() the control. once it's open , it needs to be doubletapped to close. is there a way I can prevent this behavior?</p>