The glitch for stacking the Ring of Namira with the Ring of Hircine (and being granted the former's effects while in Beast Form) has been patched with patch 1.9. To my knowledge, the other glitch hasn't yet been patched, but I can't guarantee that to be true. It requires very specific timing though, and make sure you are dual power attacking (holding both LT and RT simultaneously). Narm's Guardian of Silence describes the process in more depth, I believe.
The glitch for stacking the Ring of Namira with the Ring of Hircine (and being granted the former's effects while in Beast Form) has been patched with patch 1.9. To my knowledge, the other glitch hasn't yet been patched, but I can't guarantee that to be true. It requires very specific timing though, and make sure you are dual power attacking (holding both LT and RT simultaneously). Narm's Guardian of Silence describes the process in more depth, I believe.