I switch runlevels between 1 & 5 a few times a week and most of the time it works perfectly fine, but occasionally for no apparent reason, the thing just hangs. I do the init from a terminal in which I've su'd to root and can tell immediately when it's not going to work because about 50 command prompts scroll up the screen and then it shuts down the window manager and the screen goes blank and it's just sitting at a login prompt. But nothing on the keyboard does anything except ctrl-alt-delete at which point it does an init-6 reboot. So much for having record length uptime to rub in the windows-users faces...