Given a text field that uses the following behaviors:
Say I enter an letter 'U' into the text field, and an auto-suggest list pops up.
When I select an item (e.g. USD) from the auto-suggest list using a mouse, the onchange event from behavior A is fired twice. The 1st onchange event is for 'U' and the 2nd onchange event is for 'USD'.
This issue is mentioned as a regression by Sven Meier and related to