In 1.8rc2, I can't clear an input after selecting an item from the list. The previously-selected item repopulates the field on blur. This doesn't happen with rc1.

To reproduce:
- Type in field until the list appears
- Arrow down to an item in the list and hit enter
- Tab out of the field
- Shift-tab back into the field (all text is selected)
- Hit delete
- Tab out of the field; at this point the value selected before will re-appear