I also tried this equation:

=IF(ISBLANK(D1),"",IF(B1="",FixedDate(),B1))

D = driving value. Once data is entered here, a fixed date is placed in B

B values are still returning at 0-Jan-00.

I used this FixedDate command from September 06 to Dec 06 without any issues. Once we got into Jan 07, it no longer works.