I can confirm what he is saying about KRT. Stunning Ogre Bats can cause DC to ANYONE in the immediate area. I hazzard a guess this is about the rendering function. I watched not only a party member or two DC (I was stunning on BLM), but also our PL dc'd and nearly caused a party death. I just stopped stunning, but this would be an issue in end game events where Chainspell Stun is a common activity for RDM/Drk.