Karach armor, Mithral Plating and Eladrin Chainmail's magic properties should make them not impose Speed and Skill penalties as heavy armors, but this isn't working.
http://forums.wolflair.com/showthread.php?t=48230 (http://forums.wolflair.com/showthread.php?t=48230)
This issue has been resolved for the 2014-04-30 release
Added the following to each of them
Traits Index 1000
perform hero.assign[Hero.NoArmorChk]
perform hero.assign[Hero.NoArmorSpd]
Before: Armor effects final