These editors found a difference in the British English comma lists and the American English comma lists. The British were taught that a list should look like this: "Provides dogs, cats and hamsters." The Americans2 said, "No way! You're saying 'item1, item2a and item 2b'. You need 3 items to make a list. It can look like this: 'Offers news and events, reviews, and cheats.' This says, 'item1a and item1b, item2, and item3.' "
Another difference between the clashing Americans and British was the "humor versus humour" ordeal. British complained about having to "misspell" words when working in an American category. Americans complained likewise when editing a British category.
Eventually, with threads breaking out everywhere about various differing grammar styles, something managed to get the point across that American students and British students are being taught different things in school. This idea stated that one should not make an edit simply to make it one's way.
All in all, I can tell you first-hand that no matter how much your English teacher yells at you and pounds grammar books on your desk (no kidding), before opening up a thread, look through all of these past threads and smile upon the ODP for being as diverse as it is.
- robowar
1 - robowar
2 - Oxford, where's that?