I've noticed that in CMFI 4.0 (at least up through late 1943) US rifle squads now have 2 Springfields with grenade launchers. In CMFI 3.0, CMBN, and CMFB, they only have one grenade launcher per squad. I have no idea if this is a correction, or a bug? They also now seem to always fire their AT grenade before the HE grenades, even at unarmored targets. This is not true in my copy of CMFI 3.0.