Having just updated two computers from bo to hamm, I've run into the same problem Eric Fain described on this list a while back. It seems I'm not the only one with this problem, so finding the solution may prove useful for future updaters..
I used the apt upgrade and followed the upgrade instructions to the letter, reboots and all; /var/log/wtmp and /var/run/utmp were recreated and their rights are correct, and all software has been updated (I checked that they use libc6). Still, when logging on from the network (through ssh - I don't permit any other connection), who, finger, last, et al. don't show anything. The wtmp file is not updated, and its length remains zero. The utmp file seems to work. On a hunch, I ran xterm (libc6), and `who` showed the user running xterm. Does this help isolate the problem at all? I updated my zsh and compiled the latest ssh, but these don't seem to affect anything. Ideas? Feel free to throw suggestions my way. Thanks; //erik -- : erik bunn : ::. .:: :: . So, you think you can tell . :: :.::.:.:..:... heaven from hell? .:..:.:.::.: