Last night, June 8th, 2010 my friends and I had just downloaded the 1.3 patch. The three of us played  on leviathan vs 5 nightmare demigods. We had been playing for about 5-8 min, when I found myself in a battle with the rook. The bug that I found was the rook had nearly zero cool down time. He was hammer slamming like crazy. At first I thought that he had just canceled the first swing, but I do remember the second swing doing damage. I being lord Erebus, did bite to restore some of my health. The rook did a hammer slam four times in a row, as fast as he could cast.  It looked like he had zero cool down time, so the hammer slams were really fast. I died, that's a given. Then one other time the Rook did a boulder role twice within like 3 seconds, this was later on in the game probably around the 15 min mark. These are the only two times that I noticed this problem, and the only demigod that I noticed it from. 

I am sorry I don't have a replay of this match, I wasn't thinking of that at the time. We won the game, and the next game we played we didn't have the rook in, so I don't know how common this is, or if it just happened to be some fluke, but I have never seen this before.