Durability Doll gone missing
 

I recently realized while levelling an alt that her whole armor was in the red. the problem is, the little durability guy never showed up. I checked the movers and it was nothing to be seen.
The little guy was there in the default WoW interface and its mover was absent from other characters on which I had previously seen the bugger.

Enclosed is a screenshot taken, I believe, with no other addons than nUI running. I know I checked that particular scenario, I'm just not so sure if it's the one I saved.

I'm not sure the mechanics, but Bliz moved the durability frame into the Watch frame on 3.1 to the best of my knowledge. I'll look into it, but I'm not sure this is an nUI thing. Maybe it is.