In order to fix equipment and items to their full extent, merchants are now
required to identify which materials the equipment is made of, and use each of
those in repairs. One can no longer fix, for example, glass globe with only
glass any more, you need the hard-to-get stuff too.

Should also be noted that this effects also how equipment take damage from now
on.

This is effective from the boot.
Any odd behaviour except Ulaths should be reported to me