Just came across this site, explaining why you might consider using debfoster, deborphan and debsecan if not using aptitude:
"Housekeeping utilities for Debian packages" http://www.linux.com/article.pl?sid=06/11/17/2016215 Comments to this story: http://lwn.net/Articles/212148/#Comments -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]