The Ivory Keys blog had written this about the remix of The Nightmare:
Most Stevie Fans assumed that the Vocal Special Remix of “The Nightmare” that appeared on the “I Can’t Wait” 12-Inch Single in February 1986 was a newly-recorded version of the song since it was so different from the album version. There was also a notation of added guitar on the track by Waddy Wachtel.
However, once various Rock A Little work tapes were discovered in 2011, it became clear that the “Vocal Special Remix” versions of “The Nightmare” were actually from 1984 and were recorded before the album version. So, while it was assumed for over 20 years that the “Vocal Special Remix” was a newly reworked version of the song in 1986, it actually was a precursor to the album version.
http://www.ledge.fleetwoodmac.net/sh...3&postcount=12