The "missing 60" refers to 60 Stooge shorts dropped from the syndicated TV package in the late 1990s. They came up with a formatted half-hour show, including bumpers with trivia, and the "magic TV syndication number" of 130 half-hour "episodes."
Later, AMC picked up the same 130 shorts but they were able to get clean copies of the complete shorts without all the other silliness. One time they slipped and ran a short that wasn't in the package (illegally, I guess). Me-TV in Chicago later was able to get all 190. I don't know the status of the shorts on TV nowadays, whether all 190 are generally shown or not, but since they are all on DVD, it doesn't really matter.