Quote from MCPON_John_117
It shouldn't have any problems. When I played with this mod in 1.2.5, I had every enchantment possible on my sword (except I chose Sharpness instead of Bane of Arthropods or Smite) including unbreaking. In vanilla minecraft, unbreaking cannot be put on a sword or a bow. I did. When I upgraded to 1.3.2, everything worked fine.
Good to know, thanks. If that sorta thing did cause problems, I'm sure I could just delete the item with an NBT editor.