To the best of my knowledge, the KJV bible is the only translation to be translated from the original languages, then to a "middle" language (latin) and then into english. This seems to me like it would make this translation highly unreliable.
closed as not a real question by dancek, Jamess, Software Monkey, Arbiter, Caleb♦ Aug 29 '11 at 7:49
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No, actually you're mistaken, the King James version was translated much closer to being literal than most translations today(which tend to try to impart the meaning more than the literal word for word). It's not a literal Word for Word, but it's closer than most. It was translated from Greek and Hebrew, but the Latin Vulgate was consulted. (http://en.wikipedia.org/wiki/Authorized_King_James_Version) The previous Wycliff translation was done from the latin vulgate.
Words that were added for clarity are italicized to indicate they are not apart of the original languages. The new testament KJV used what is known as the Textus Reciptus which in English is the 'Received Text' in which there are 5000 Greek manuscripts that all agree on the content (although some have name spelling variations).
I think this is a perfectly valid question- but the answer is no. While there is a danger of the "Chinese Whispers" scenario about the way the KJV (and NKJV) made their way into English (though whether you could still call the old KJV's language English is perhaps another discussion), the meaning imparted in most if not all KJV passages is fully consistent with the other versions. Some other versions are written more for ease of reading than for accuracy but again this doesn't render them redundant.
What I would always say is that if you're studying a passage in depth or struggling to understand its meaning, don't rely on any one version but look at several, and read around the subject using other trustworthy sources.