Date format error in edit crucible review dialog

Error message: something about date format?
https://img.skitch.com/20110204-t1abwi2qaxmixwa29dne8p3gy2.jpg

This error occurred when I clicked on "edit review details"
https://img.skitch.com/20110203-f3bckjfuuy73kmn3meiyakt5df.jpg

Scrolled down and selected a time:
https://img.skitch.com/20110203-8rxjc4jfbe1qsp8kyqw4gi2w7y.jpg

Left the date field empty (I think), and then clicked "done".