The first one is when u eat fowl it is a leg of chicken if u put it in the 1-5 hotkeys you can eat it for ever, after u eat it it keep appearing so u can re-eat the same item, it fills the yellow bar of stamina but it is really empty so you still move slow and you cant atakk
The second one: at deepuben (zypern) the armor and weapon seller (the one that have the logo of a shield with swords) dont pay you money when you sell things to him it says something with quest error.