The Troll's Belt was described as "increasing capacity by 10%" however, the player who found it saw his weight gauge move from 100% to 82% with it worn, and also 37% to 33%. We're not sure what in the world is going on. Looks like it may be reducing the weight of the items by 10%, not the actual total capacity of the player. However, the math still doesn't work out.

Another curiosity is that the Troll's Belt cannot be worn by mages, but the [superior] Ogre's Belt can. Go figure.