After initializing my dropdown and setting the selectedItemIndex to -1, I would have thought when selecting the first item in the dropdown (with index of 0), it would trigger the selectionChanged event. This doesn't appear to be happening. I have confirmed the dropdown activeitemindex and selecteditemindex are set to -1, but the event doesn't get fired until you have selected any other item except the first item in the list.
Idea's/thoughts/solutions?
Paul