After upgrading to 7.5 amd64 -stable (and all ports updated) I get these messages in /var/log/messages. This is with bash from ports inside tmux over SSH:
tmux: vfprintf %s NULL in "%.*s" bash: vfprintf %s NULL in "%.*s" multitail: vfprintf %s NULL in "%.*s" vim: vfprintf %s NULL in "%.*s" tmux: vfprintf %s NULL in "%.*s" bash: vfprintf %s NULL in "%.*s" multitail: vfprintf %s NULL in "%.*s" bash: vfprintf %s NULL in "%.*s" top: vfprintf %s NULL in "%.*s" top: vfprintf %s NULL in "%.*s" bash: vfprintf %s NULL in "%.*s" last message repeated 2 times irssi: vfprintf %s NULL in "%.*s" bash: vfprintf %s NULL in "%.*s" bash: vfprintf %s NULL in "%.*s" mutt: vfprintf %s NULL in "%.*s" vim: vfprintf %s NULL in "%.*s" -- Eivind Eide "ONLY THOSE WHO ATTEMPT THE IMPOSSIBLE WILL ACHIEVE THE ABSURD" - Oceania Association of Autonomous Astronauts