Expiry date in database invalid

Using Drupal 4.7 with the latest CVS there seems to be a problem where the auction expiry date being inserted into the database is invalid. In the 4.6 version the "expires" field in the ec_product_auction table holds a value of something like 1147054836. However, in the CVS version on Drupal 4.7 the same field holds a value of 2006, and that is all. When setting the expiry date on node creation the date you specify is accepted, but the auction has expired immediately. When you go back into edit the node the expiration date is set at "1970-01-01 00:33 +0000" regardless of what you have entered. Manually editing this field in the database to something like 1147054836 seems to work though, as long as the resulting expiry date is still in the future.