procmail-3.22-4 appears to have a new example procmailrc in 
/usr/share/doc/procmail*/telsas_procmailrc.

Oh. My. Gods. I recognise that :) 

Seriously, I have a newer one which has up-to-date URLs (the ones at the
top are now 404, for example), and better patterns for mailman lists.

The one you have is http://www.linux.org.uk/~telsa/BitsAndPieces/procmailrc-1.0
and I have recently updated it: the current one is procmailrc (no -1.0). I
think it is very very well worth swapping to that one. It has more useful
addresses and better patterns.

It might also be worth substituting something something else for 'shit' in
the 'testing' section. When I wrote that, I didn't expect anyone to be shipping
it! 

I'm still stunned someone included that!