As mentioned in the related issue CONF-15539, extranet.atlassian.com's database contained two rows that were almost entirely null, including creation/modification date. At least one of the pages has an attachment. I added the dates in manually, but how these records came to exist is a mystery. We should add not-null to the date columns to prevent this from happening again, but of course such constraints are difficult to add retrospectively. The date on the attachment attached to 1717142914 is Apr 02, 2009, so the bug may have been only in some early 3.0 milestone.