I just dist-upgraded my amd64 wkstn, and xdm is broken. There seems to be something wrong with the sessreg program, and nobody can log in via xdm. I was able to workaround by disabling sessreg in /etc/X11/xdm/xdm.options Anyone else seeing this? If you haven't got this version yet you might want to hold off on upgrading. -jwb