The faint marks over the text are someone else's proofreading marks ("SP" and circles).
BTW, the Spankers were having lots of fun up on stage. Guy Forsyth was there, rocking out, and they mixed up the lines if the "If You Want Me to Love You" duet with Guy and Christina, adding a few that I don't think I'd heard before. For the encore, they all came back on stage and picked up someone else's instrument and attempted to play through one of their dirtier melodies. It was like listening to them on warped-in-the-sun vinyl -- the notes were mostly there, but the timing was very, very off.
There was other goodness that evening too, but I'll tell more about that some other time :)