Just printed my boarding pass for tomorrow's flight and there is a new info field I've never noticed next to the plane graphic and Southwest.com logo:
LN: "last name"
FN: "first name"
MN: "middle name"
The top of the boarding pass still has the "LAST NAME"/"FIRST NAME"
Hmmmmmm.......adding details to ensure correct name sequencing for Pre√ maybe? Or, have I just been oblivious to this info on my boarding passes?