Strange I had a problem using melee power stance the other night, the activation animation happened but the status icon and effect never happened and I tried it on and off a couple of times in the same fight when I swung my 2handed sword it did cost an extra point but did no extra damage and the hit% chance was still 100%. It had never happened before and has not happened since and everyone elses abilities were working correctly, I shrugged it off but I could not figure a reason for it other than BUG! I have not heard of anyone else having a similar problem, until now. That sounds a bit similar.