Saving money for a govt department that produced books used in navigation.

I offered to do it in Postscript to save a lot of money in typesetting costs.

Result looked fantastic; off to the printers it went.

Few weeks later, a customer noticed that an entry in August was incorrect. The entire run had to be pulped and re-run using the usual printers services.

Good thing someone checked; the wrong information could have had dire consequences.