title: ListBox alternating rows background in Windows Phone becoming separated
body: <p>It seems when applying alternating row background colours today on Windows Phone 7, if you have a large set of items to be displayed in the ListBox, the row colours eventually drift out, double up and skip rendering.</p>
  
  <p>Anyone had problems with this, is this a bug in Windows Phone? My code can't get much simpler. I followed this article precisely: <a href="http://chillijam.co.uk/2012/01/11/alternating-listbox-item-background-colours-in-wp7/" rel="nofollow noreferrer">http://chillijam.co.uk/2012/01/11/alternating-listbox-item-background-colours-in-wp7/</a></p>
  
  <p><strong>Starting off well:</strong></p>
  
  <p><img src="https://i.stack.imgur.com/2TEsA.png" alt="Starting good"></p>
  
  <p><strong>After about 6 flicks of the scrollbar:</strong></p>
  
  <p><img src="https://i.stack.imgur.com/40Nwq.png" alt="enter image description here"></p>
  
  <p>As you can see, pretty shocking, and it only gets worse and more separated. Thoughts?</p>