Yes, I had the same issue. When my priest was on follow and I stopped moving, his memory rate usage would skyrocket and he would disconnect. I enabled V-sync and that stopped all the disconnects. His memory rate still goes up here and there though.

Blizzard knows about this and supposedly will fix it. Here is a blue response from them:

http://forums.worldofwarcraft.com/th...sid=1&pageNo=1