There are some people who insist that only the King James version of the Bible is acceptable. (Specifically, Fundamentalist Baptists.)
In addition to the fact that the KJV was not even available until 1611, that's really stupid for another reason: Grammatically speaking, the KJV IS JUST PLAIN WRONG!!!
Consider Galatians 6:9, for instance. The KJV says, "And let us not be weary in well doing: for in due season we shall reap, if we faint not." But anyone familiar with the rules of English grammar knows that it should say, "weary in good doing". I could use a whole lot more well-doing. It's doing good, not doing well, which tends to cause weariness to people.
Fortunately, other translations seem to grasp the distinction between doing good and doing well.