Apparently,
After a fresh install of the game and loading the 2.5.1 remix which included the hand patch, model reworks, etc, there seems to be some files missing. Noticed it first when Areith appeared for the first time, and noticed it again when Tiffa finally joins the party. The first error said something around hand_1_01 or something where it seemed like both of Areith's hands were gone, and the other was Tiff .t09 . I must be missing something....
Update:
Another file is also missing: EAREITH .T09 ...