While the NKJV claims to follow the Received Text in the transalation itself, (footnote issues aside) and for the most part does, there are certain documented instances where it actually follows the Critical text readings, not in the footnotes, but in the body itself:
II Corinthians 3.14, II John 7, Acts 19.9, 39; Philippians 2.9 and Revelation 6.11.

For more information see the latest issue of TBS's "Quarterly Record" in its critique of the NKJV.

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Rev. Adam King
Minister without a call (WPCUS)
Stated Supply: Reformed Presbyterian Church
Sterling, KS