Several Weapons and Armors have bad properties (e.g. Orcish WarAxe considered to be made of Iron, 2-Handed Sword considered a 1-Handed Sword for perks purposes, etc.). This mod (in theory) fixes them all. Well all weapons at least. I'll add Armors soon. See mod description for full details.
If I missed something let me know.
-- Headbomb
(See also http://www.reddit.com/r/skyrim/comments/o6ivz/bethesda_qa_and_respect_for_gamers on the issue.)