Not a problem for qtconsole in OSX nor Ubuntu, nor for plain ipython in Windows.
This is a more general issue: On Windows, IPython.utils.io.stdout/stderr` should be forwarded to the frontend, but are not. Instead, they are hooked up to the pyreadline console object (which I think we do for color reasons). Obviously, we should not hook up to the pyreadline object in the zmq kernel; only in the Terminal frontend.
Working correctly 9/20/2011.