Haven't heard about this before. One article says:
  
  Singer/guitarist Lindsey Buckingham, who left after Tango and
  returned for Mac's lucrative 1997 reunion, produced the album,
  which also features singer Stevie Nicks, bassist John McVie and
  drummer Mick Fleetwood.  Singer/keyboardist Christine McVie
  retired.
  
  The album, recorded in Los Angeles over the past 18 months,
  contains new songs written by Buckingham and Nicks. It also has
  a studio version of Bleed to Love Her, which had been included
  on 1997's live reunion disc, The Dance.  Snippets of Say You
  Will can be heard in Fox promos for That '70s Show.


 - michael