Comment 4 for bug 401499

Just uploaded an Apport report about this from Karmic standard installation. I didn't have a failed login though.
gconftool --get /apps/gnome-system-log/logfiles
[/var/log/bootstrap.log,/var/log/dpkg.log,/var/log/auth.log,/var/log/udev,/var/log/syslog,/var/log/daemon.log,/var/log/kern.log,/var/log/lpr.log,/var/log/mail.log,/var/log/user.log,/var/log/mail.info,/var/log/mail.warn,/var/log/mail.err,/var/log/debug,/var/log/messages,/var/log/Xorg.0.log,/var/log/pm-powersave.log,/var/log/dmesg,/var/log/jockey.log,/var/log/boot,/var/log/btmp,/var/log/dmesg.0,/var/log/fontconfig.log,/var/log/pycentral.log]

There is a btmp, attached properties as screenshot. It doesn't open with gedit, it says either coding isn't correct or it's a binary.