/var/log/syslog empty
I got it to work by changing ownership from messagebus.adm to syslog.adm, and then restarting rsyslog.
Kind of disturbing that this broke silently. Given this experience I am not terribly confident that the other log files are owned properly. Here's what I have currently:
-rw-r--r-- 1 root root 0 May 1 06:31 alternatives.log
drwxr-x--- 2 root adm 4096 Jun 9 06:46 apache2
drwxr-xr-x 2 root root 4096 Jun 1 06:48 apt
-rw-r----- 1 messagebus adm 0 Oct 22 2012 auth.log
-rw-r----- 1 root adm 0 Oct 22 2012 boot
-rw-r--r-- 1 root root 0 Oct 22 2012 boot.log
-rw-r--r-- 1 root root 0 Oct 22 2012 bootstrap.log
-rw-rw---- 1 root utmp 2688 Jun 6 10:31 btmp
drwxr-xr-x 2 root root 4096 Oct 18 2012 ConsoleKit
drwxr-xr-x 2 root root 4096 Oct 16 2012 dist-upgrade
-rw-r----- 1 root adm 11669 Jun 6 13:16 dmesg
-rw-r--r-- 1 root root 24494 Jun 6 11:30 dpkg.log
-rw-r----- 1 root adm 117 Jun 9 06:46 fail2ban.log
-rw-r--r-- 1 root root 24024 Apr 11 10:36 faillog
-rw-r--r-- 1 root root 1202 Apr 10 19:13 fontconfig.log
drwxr-xr-x 2 root root 4096 Oct 18 2012 fsck
drwxr-xr-x 3 root root 4096 Oct 18 2012 installer
-rw-r----- 1 messagebus adm 0 Oct 22 2012 kern.log
drwxr-xr-x 2 syslog root 4096 Oct 18 2012 landscape
-rw-rw-r-- 1 root utmp 292292 Jun 9 10:38 lastlog
-rw-r----- 1 messagebus adm 0 Oct 22 2012 mail.err
-rw-r----- 1 messagebus adm 0 Oct 22 2012 mail.log
drwxr-s--- 2 mysql adm 4096 Jun 9 06:46 mysql
-rw-r----- 1 mysql adm 0 Apr 29 07:48 mysql.err
-rw-r----- 1 mysql adm 0 Jun 9 06:46 mysql.log
drwxr-xr-x 2 root root 4096 Oct 18 2012 news
drwxr-xr-x 2 ntp ntp 4096 Aug 20 2012 ntpstats
drwxr-xr-x 2 nobody nogroup 4096 Apr 10 23:00 passenger-analytics
-rw-r----- 1 syslog adm 3538 Jun 9 11:10 syslog
drwxr-xr-x 2 root root 4096 May 24 2012 sysstat
-rw-r--r-- 1 root root 285653 Jun 6 13:15 udev
-rw-r----- 1 messagebus adm 0 Oct 22 2012 ufw.log
drwxr-xr-x 2 root root 4096 Jun 8 06:29 upstart
-rw-rw-r-- 1 root utmp 44928 Jun 9 10:38 wtmp
Does this look correct?
Edit: related discussion here.