In fact the MKJV is probably more accurate the KJV and is truer to the earlier English bibles than the KJV.
Note, the KJV can be used horrendously if it is taken as the only bible. For example, Gen 1:28 below, "replenish the earth" is a favorite for gap theories, the theory that there was a pre adamic race before Adam and Eve. The word replenish is taken to mean that Adam and Eve have to refill the earth after it was previously filled by a pre adamic race.
Likewise, the KJV referring to the Spirit as an "it" is a favorite of Jehovahs witnesses who dont' believe the Holy Spirit is a person.
The reference to turtles instead of turtle doves in Lev. 12:8 is also fixed up which is good!
(KJV) Lev 12:8 And if she be not able to bring a lamb, then she shall bring two turtles, or two young pigeons; the one for the burnt offering, and the other for a sin offering: and the priest shall make an atonement for her, and she shall be clean.
Turtles? lol, it should be turtle doves as the MKJV correctly puts it.
The MKJV seems to be the best bible of all in my opinion given they have fixed up these problems with the KJV.
http://www.baptistboard.com/showthread.php?t=29495
Often when the Modern KJV (MKJV) has a word that is different from the KJV, it is a word from one of the earlier good English Bibles of which the KJV was a revision.
Gen. 1:28c
fill the earth (Tyndale's, Coverdale's, Matthew's, Geneva, MKJV)
replenish the earth (KJV)
Gen. 6:5
LORD (Coverdale's, MKJV)
God (1611 KJV)
GOD (present KJV)
Exod. 5:8a
the number of bricks (Tyndale's, MKJV)
the tale of the bricks (KJV)
Exod. 29:40a
tenth part (Geneva, MKJV)
tenth deal (KJV)
Lev. 12:8
turtledoves (Coverdale's, MKJV)
turtles (KJV)
1 Sam. 20:40a
weapons (Coverdale's, Matthew's, Great, MKJV)
artillery (KJV)
Psalm 67:2
salvation (Bishops', MKJV)
saving health (KJV)
Prov. 30:23
hateful woman (Geneva, MKJV)
odious woman (KJV)
So you may want to stick to the MKJV rather than the KJV, depending on what you are using it for.