Backspace works differently with ui-date and native jquery datepicker

[linagee]

On the native jquery datepicker (see demo at: http://jqueryui.com/datepicker/) I can click to get the popup, and also backspace and type in dates.
With ui-date, I can click to get the popup, but when I try to backspace it freaks and out and "overwrites my text". (Its probably some onchange thing firing?)

[linagee]

I have verified the bug is present when using Chrome Version 31.0.1650.63, and Firefox 26.0. (These should be the newest versions as of this comment.)
The ui-date and angular versions I used was from the demo on this page (http://angular-ui.github.io/ui-date/)

[kdekooter]

duplicate of #18