[curt.clifton]

What version of the software and Mac OS are you running? At one time there was a problem with the date-picker calendar where the date would be lost unless you pressed the "return" or "enter" key. I can't seem to reproduce it now in OF 1.6.1 on Mac OS 10.5.7. Also, pressing the "esc" key after clicking a date in the date-picker will cancel the date entry.