PRJ: Can't Delete Date by Pressing Space Bar

SYMPTOMS

In Microsoft Project 98 or later, pressing the space bar no longer clears the date for a task. For example, in Microsoft Project 4.1, if you select the Actual Start date for a task and press the space bar, the date changes to a value of NA. In Microsoft Project 98 or later, if you select the Actual Start date for a task and press the space bar, the original date is reinserted in the cell.