Ok, so aerovistae and Larry edited my answer to this question, with the only change being to change 'carburettor' to 'carburetor'. Now, my immediate response was to roll back the edit, because as far as I'm concerned, my original is the correct spelling - but I'm well aware that the second version is the U.S. spelling (and, indeed, both with -er are considered correct in other regions)
When I've been editing posts, I've always left regional spellings - tyres vs tires being a common one - in the original poster's dialect, which I thought was the general principle on this site? After all, we have a pretty global userbase...
Thoughts?