jbw wrote:I think spelling ketchup as "catsup"
is a much greater and ridicule-
worthy offense.
Not according to the ninth edition of Webster's where "catsup" is given as the standard and "ketchup" as the variant.

Actually, I should amplify this somewhat to be fair, since the 9th edition was published in 1983, and in the 80s there was a dramatic shift in usage as a result of the following:
"In the 1980s, there was some issue over how to classify 'Ketchup' under the federal food program, and the feds, those ever-clever fellows, declared that Ketchup would appear on school lunch menus as a vegetable. This created a lot of angst over at the old Del Monte Catsup works because, suddenly, their Catsup, due to its spelling, was out of the loop and excluded from the government's approved list. Not very long after that, Del Monte changed the name of its product from 'Catsup' to 'Ketchup.'" ( from
http://www.inmamaskitchen.com/FOOD_IS_A ... tchup.html)
Since then, all marketers, to be on the safe side, have followed Del Monte's example, and "ketchup" now predominates, although both spellings are still perfectly acceptable, except among those, I assume, who are convinced "ketchup" is a vegetable.
"The fork with two prongs is in use in northern Europe. In England, they’re armed with a steel trident, a fork with three prongs. In France we have a fork with four prongs; it’s the height of civilization." Eugene Briffault (1846)