Issue: Essentially if you use an optionLabel, the incorrect dataItem is pulled back using the event.item.index() as well as the event.sender.dataItem() methods.
Reproducible demo here: http://dojo.telerik.com/awona
Steps to reproduce:
1) Choose Maria, first real option in the drop down list.
2) Note at the top of screen, index 0 and dataItem is the optionLabel. It should be index = 1 or at the very least, dataItem should = Maria Anders.