title: Adobe Flex Combobox DataProvider
body: <p>I have a project that was compiled with the Flex 3.2 SDK.</p>
  
  <p>One of my components is a combobox, which is bound to a property (called products) in the Cairngorm model. If I insert a new value into model.products, then the combobox immediately shows the new value. Works perfectly.</p>
  
  <p>I then moved to the 3.5 SDK, and running the identical operation causes a problem. Even though the model has been updated (I have verified that this is definately the case), the combobox does not show the new value correctly - it seems to be aware that there is a new item because there is a new row in the combo, but the new row is blank and unselectable. The existing items in the combo are there and selectable (as they should be). If I re-initialising the form (i.e. close and re-open the TitleWindow on which the combo is located), then all the correct values (including the new one) are shown in the combo.</p>
  
  <p>I have swapped back and forth a few times between 3.2 and 3.5 to verify that this is indeed the root cause.</p>
  
  <p>Any idea on how to get around this would be greatly appreciated.</p>