[pwyll]

There are several earlier songs that Stevie is either very faint in the mix or not at all (at least to my ear):

White Album:
Over My Head...Single mix a little better
World Turning...very minimal
Rumours:
Don't Stop....Not too audible, but there to a slight extent
Songbird
Tusk:
Think About Me....Not too audible. Single version much better (unless it's Lindsey)
Save Me A Place....I don't think she's on it.
What Makes You Think You're The One....obviously not on it.
Not That Funny....Obviously not on this song.
That's Enough For Me.....Not on this song.