Updated from 10.2.1 to 10.2.3(combo), Can’t login

:( I'm about to panic. I have just updated from 10.2.1 to 10.2.3 with the combo update from apple, and now i get a blue screen when booting up. The progressbar appear when booting, but when booting is almost done and the logon-screen should appear, i get a blue screen. I have tried doing a safe boot (holding shift-key on startup) but no go. I also tried this: http://docs.info.apple.com/article.html?artnum=106464 (symptom I), didn't do the trick either Browsing the Apple user forum tells me that i'm not the only one with this experience, but what do i do? Do I reinstall the server software from scratch? If so, is there a way of backing up the Netinfo DB via the Single-user-mode boot (command+s) regards jake running OSX10.2.3(with problems) on a G3 Blue&White