jQuery UI Datepicker - date being inserted on close

Question

I have just recently upgraded to the latest version (1.8.5) of jQuery UI and noticed a change of behaviour in Datepicker widget.

If you open the Datepicker and then click/tab away (i.e. don't press the 'Done' button) the auto-selected date gets populated in to the input field.

I was previously using version 1.7.2 and with this version if you clicked away without pressing the 'Done' button then the input field would remain blank. I prefer it this way.

I looked in the changelogs and could not find anything regarding this change. Anyone know how I can restore the old behaviour? Thanks.

EDIT: Sorry I made a slight mistake - I'm using the Timepicker widget (http://milesich.com/timepicker/)

UPDATE: Upon further investigation it does seem that the problem only occurs when using the Timepicker plugin. Anybody else able to replicate this?