So I noticed a while back, that in a particular post, Tom appeared to have difficulty spelling the word "Madness," transposing the D and N ("Mandess"). It turned out that there was nothing in the language filter to cause that to happen, that I could see, so I added an entry to turn the misspelling of the word back to Madness, and that fixed it.
Then I noticed today that in one of Kat's posts, a similar thing was happening to "Badness" (changing to "Bandess"). So I replaced the "Mandess => Madness" entry with a "ndess => dness" entry... Ya know, figuring that would fix your "Madness", your "Badness", your "Sadness" and so on...
Well just for shits and giggles, I took another look at the language filter just now, and as it turns out, upon closer inspection, there was an entry to fix "adn," the common misspelling of "and." So that was what was causing it all along.
So... Whomever the person was who setup "adn" in the language filter, is who's fault it was