This includes Battle Machines and Woodsmen's Forest Marauders. Battle Machines can still shoot and Horsemen can still attack, so this suggests an issue involving range. Perhaps it was formerly calculated from the unit's perimeter and now it's being calculated from the center? It seems particularly bad when attacking small units. I've been seeing machines and moose standing around while infantry have been beating them up, but my Battle Machines seem able to attack buildings just fine.
Revision fd6ce6