It might be misreading your "null" as a negative number - epoch time is measured as the number of seconds from 1.1.1970 IIRC, and a lot of time values are stored in the database in epoch time values. I'd check the code but I'M ON VACATION! so maybe Aaron'll get bored later today and tell you.
It the mp3 interview and all that jazz, CRZ said he appreiciates all the readers he's picked up. Can't he send some of that appreiciation back and tell his readers why he decided to go bye bye instead of leaving us hanging?