The flatfield normalizations in the on-line flat tool were incorrect between Jan. 23, 2002 and Oct. 16, 2002, 17:30 EDT. However, since the photometric keywords in the headers continue to be largely incorrect, this should only affect your data if you were trying to make your own photometric/DQE corrections for temperature with these flats. The new post-NCS flats available in CDBS, and also available from our reference files web page, are normalized correctly.