Gray Beard, I think you mean this one:
[link=http://www.outerzone.co.uk/plan_details.asp?ID=3127]Outerzone.co.uk 65in Satyr FF Plan[/link]
Yes, I remember the advice, it had something to do with having better rudder control by reducing the dihedral to norms. The rudder planes by Ken Willard had moderate but not excessive amounts of dihedral. Low wings require more dihedral for stability under rudder control due to location below center of gravity. I guess too much dihedral is as bad as not having enough under radio control.