Go to the URL and notice mozilla-source.* is from 2004/11/23. This needs to get updated again.
While we're at it, any chance of a fix for bug 170779 at the same time?
The machine that creates these tarballs never got some mozconfig changes that are needed now for pulling Suite. It's been updated to use a new mozconfig and nightly Seamonkey source tarballs should be flowing once again.