See thats the difference between the ignorant and the genius.
What terms to search 
You can probably choose almost any of the words from the error message and you will get a match. Try the google search yourself. e.g.
/etc/cron.daily/sa_update: contribs.org
or
'MISSING_SUBJECT' contribs.org
See - no genius required!
But you do not need to do an expert search in any case. If you have any suspicion that something isn't working correctly (which clearly you did) you should open a bug in the bug tracker.