Ok I'm not in the mood of explaining this in lenght. Basically, I got a Cormyrian leather armor from the Eveningstar challenges, and it has 2 effects on it:
Once I put it on my wolf (and only on him, not on my character) two more random effects appear, and this happens every time I equip it. I don't know if this is a general bug, since I only own this single set of Cormyrian armor on my druid.
I made a little film on YT, because I'm too lazy to complete a huge form (And I want to bring it to the attention of my fellow players rather than have it lost in the big Turbine bug-dumpster)