An issue with adding new items to ComboBox after 6 -> 7 migration

Hi all!

So I have a ComboBox with new items allowed. It appears that when the user wants to add a new item, they have to press enter after typing the item so that the new item gets added to the list. However, the very same ComboBox in Vaadin 6 adds the new item right after the box loses focus.

This is a minor but very annoying change in the way the component behaves. Is there any way for me (short of hacking VFilterSelect) to restore the previous behavior? Any pointers where to start?