Funny that. Good old Webster and his literary revisionism - you know when you've succeeded when later generations believe that he was right all along.
Language is populism. The people who use language are the people who define it - why do you think we only have knowledge of Vulgar Latin instead of High Latin? It's what got preserved, because it was what the people spoke. There's no "correct" way to use language, that's simple fallacy - because if there were, then either everybody would always be wrong or the definition would literally have to change every few years. Is the use of "google" as verb incorrect? What about twenty years ago? Twenty years from now? Who knows.
Point is: http://en.wikipedia.org/wiki/File:English_dialects1997_modified.svg
The majority of english speakers in the world speak US English. Therefore, it is the "correct" way. You can babble on about the Queen's English as much as you want, but language is evolution, and by your argument I could get all up in your stuff about not using "thee" and "thou" - because it's proper, and the laziness that leads to not using it is part of the downfall of the english language. Forsooth. We should have never shifted our vowels in the thirteenth century, that was a terrible idea.
Note that this is not a defense of Webster, I hate the guy. I prefer my humours with u's in them. But the majority of time when you're speaking English, it's correct to spell it humor. Because the majority of the time, you'll be a US English speaker. And that's language.
edit: Also, we really need to convert to Metric already. Just saying. I'm already mentally using Centigrade, just need to mentally convert to meters now.