I just installed FC6 on a Dual Athlon box. First I had the "udev" problem where it would hang on the modprobe line in 50-udev.rules, which I commented out so the system would boot. Then the GUI to create a xorg.conf for multiple monitors wouldn't work, it never does for me. I manually configured it and Xinerama on 4 monitors now works fine. Lastly, Thundirbird won't allow me to compose or reply to a message. I get the error: An error occurred while creating a message compose window. Please check your installation. I've never seen this problem before. All other popups in Thundirbird work ok from the tools menu. It's a strange one! It works ok on FC6 on other computers but not my Dual Athlon box. This was a fresh install of FC6 on what was an FC4 box. My home dir remained intact. Couls there be a FC4 setting in my home dir messing up thunderbird? Thanks Doug P