I've had a few times that WoW.CA happens to have a memory leak all of a sudden. It seems to happen when I idle and go back to the character selection screen. Logging back in keeps WoW.CA active but apparently after a few times it triggers a memory leak. Memory of the process goes up to around 10GB (im using the x64 version) and computer appears to be really laggy.
I'll try to take a screenshot next time it happens.