DateField was setting the input value using the formatString instead of the inputFormat. This causes all publish dates to be 'day month year' instead of 'year-month-day' on load or when clicking the today button. At that point the post can not be saved because the format violates the date validation requiring 'year-month-day'. The DateTimeField was already doing this, so it should be safe to assume it was an oversight.
DateField was setting the input value using the formatString instead of the inputFormat. This causes all publish dates to be 'day month year' instead of 'year-month-day' on load or when clicking the today button. At that point the post can not be saved because the format violates the date validation requiring 'year-month-day'. The DateTimeField was already doing this, so it should be safe to assume it was an oversight.

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