I have some framerate problems with certain characters. Orderic is prob the only character, without the framerate issue.
Viewing post in Bug report
'Had the same on the Mac Demo on my Core2Duo MacBook (2,13 GHz, 8 GB RAM, SSD Drive, NVIDIA GeForce 9400M 256 MB ), but in all NPC Duels - the targeting for the attacks was really lagging, too, and had to throw a few potions to get the last couple of steps to not "finish" first / lose.
So, maybe would be nice to get an idea about your system config (processor, RAM-amount and GPU at least) to see if it's some older hardware issue or maybe a code processing problem.