When I finished Throne of Bhaal a couple of weeks ago, I noticed something strange was happening with Cernd. Once in a while, when he was shapeshifted and engaging in combat, he spontaneously changed back to his human form. When I clicked his special abilities button, the "Shapeshift Natural Form" button was available even though it looked like he was in human form. This happened with both the Greater Werewolf and Fire Elemental shapes. Is this normal? I thought it might be a technical error, but the only things I have are the patch and the flirt pack (P.S. Viconia comes across even more like a hooker with the new flirts).

Something similar hapened to me yesterday. I use the 9lvl spell Shapeshift (awesome spell for multichar, i've hit 3 times as ilithid Yaga-Shura and he was dead).
After battle i've returned to human form and even after some time when the spell was gone i still have in special abbilities the natural form abbility.