If someone decides to poke around in the 3D plotting files in response to Leon's efforts, there's another fix posted a while back which was not applied: <http://sourceforge.net/mailarchive/forum.php?thread_name=d8cf9020703071339y43354eaerbfa1a47d272e5d26%40mail.gmail.com&forum_name=matplotlib-users> I tried this at the time and it worked with no obvious side effects. Gary R.