The way that the protect armour/weapon/item spells works has been changed in a
manner very similar to how feather weight was changed a while back.
-- the blue glow on items will no longer expire in chests.
-- the spell's duration is cut down to one-sixth.
Again, this is a pure upgrade if you play four hours a day or less. Other
items/effects apply blue glow, and they will fall into line shortly
thereafter.
There will be a noticeable grace period while things switch over, during which
time a lot of blue glows won't seem to fall off at all. Don't get too used to
that.