Up until the very last patch, I've been having weird problems with my mouse. Sometimes when I change maps (and at least twice I've logged in to this problem directly), I can move my mouse cursor around but I cannot click anything with the left mouse button or rotate the camera by holding the right mouse button. I know for sure my mouse works well and I can tell that I haven't DCed from the game because I can still type text into general chat.
Does anyone know what could be causing this? No hardware changes, no software changes (installs, uninstalls) either.