Steps to reproduce:
1. Select any date in a DateField control.
2. Select the same date again.
3.
Actual Results: The selected date is not cleared from the datefield control.
Expected Results: It should deselect the selected date. (This worked in Flex 2)
Workaround (if any): Add functions to run onchange to compare selected date with date chosen in the control and clear selected date if it's the same date.
For consistency, now you CTRL + Click to deselect the date.