Hehe… it’s kind of fun to be reading an article and see an error message you wrote. (or at least think I wrote; I honestly can’t remember now, but it feels like one of mine)
‘Purge’ command not working in OS X 10.8.1 | MacFixIt – CNET Reviews.
It’s also laughable that the authors of the article didn’t actually do the research of, you know, maybe running the command, to see that the error message is harmless. “May” not work properly, pfft.