Systemd 230-1 is not in testing yet. I have had no problems with it except forhttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=825394
example for me is a tmux session under /home/pax/ Ctl-Alt-F1 or "systemctl stop lightdm" kills the non graphical running processes of user pax.
Fix is (from Dizzie at vsido irc) "You can disable it, look at the systemd config file. KillUserProcesses=no in /etc/systemd/logind.conf" I will be applying it to three machines, I sometimes have my openvpn under a tmux and also closed ended but long running processes like unsion, rsync, etc. Technically not a bug, it is a design flaw (for my usage).
apt-listbugs will probably not catch this but hopefully a message will pop up and tell you about the change when this hits testing.
edit add from logind.conf "Note that setting KillUserProcesses=yes will break tools like screen(1) and tmux(1), unless they are moved out of the session scope. See example in systemd-run(1)." end edit.
Please, no systemd flame replies.
Many here will not be affected by this.
edit. systemd-230-1 is now in testing. /etc/systemd/journald.conf also has minor changes, I accepted but I like persistent as opposed to auto. RateLimitInterval became RateLimitIntervalSec As always - man journald.conf