In English language news, I ran across a spelling error yesterday that had been picked up verbatim from a previous book. Which book had picked that spelling error up from a different previous book. I checked four books, and the spelling error was in all of them.
One of the fun things about Google Scholar is that you can do a search on your own stuff or some classic paper and see how the citations of said stuff change over time, as people copy previous errors and insert their own. Eventually you find out that you published a paper in 1897 in the Journal of Psychiropractic Medicine or some other field that doesn't really exist. I'm not sure if it's more like an accumulation of DNA mutations over several generations or more like that party game where a chain of people whisper a message to the next person in line, but either way it testifies to the carelessness of the science community when it comes to citations.
It might be fun to be a Psychiropractor, though.