Attribute points and Skin of Tuurgin I. When I'm in shaman's Skin of Tuurgin I, trying to use my allocation points actually reduced my total points when I pressed max. It did add those points back to my allocation total although It's hard to tell if it was a one to one return of my points. I went from having 20 to 54 allocation points.
I tried logging out and restarting the client, but the problem persisted. Removing the buff did allow me to reinvest the points, although I'm not sure if it was limited or changed anything.