I changed my username from none to noscar and screen works indeed perfectly well. I can therefore confirm that incompatibility with the username none. I'm also surprised that choosing such a username would introduce similar malfunctionings. As for me, I don't think I need to stick with none as a username - I will find something else. Rather, I'm very glad someone was able to exactly pinpoint the bug in such a very short time span. (I couldn't reply earlier by the way, we were moving to another house yesterday. :-)
