When the date picker was changed, date-type custom fields for fixed assets no longer show any date on Edit screens. The program apparently remembers the dates that were entered, as they show on the Fixed Assets tab listing if the fields were checked to show as a column.
This problem may appear elsewhere (or everywhere), as I have noticed that date picker fields are blank when looking at some transactions. These occurrences were in test businesses, however, so I cannot be sure what content might have been there originally.