I can't equip great swords (whether as a PC warrior or to an NPC warrior follower). The button is there, but they don't equip -- they just don't move from the inventory slot they were in.
You have a shield in the offhand?
In any case, I am going to change it, so if that is the case, the shield gets unequipped, because it can lead to confusion.
Also, I have seen quests to catch a baddy "In the northwest Sagar forest, in the foot hills, north of the river, to the east" but they are never there -- I don't see an encampment spot on the map. There is a camp to the west, but they are never there either. Could this be an old map spot that was removed? I've come to just let those fail. I do get "...to the west" and "...in the Gorx lair," too, so I know its not these.
Fixed for tonight's build, sorry for the inconvenience.