Hi, Back in 2010 (Apri-ish according to google) I reported that tmux left a zombie process behind on initial launch. If user detached and reattached, the zombie process cleared. I even provided a patch, which I believe was accepted, but then replaced with a slightly different version. However, since then I have noticed this behavior (or a similar issue) return. On initial launch of tmux, there is a zombie process left around until a detach. I have not investigated this further, so it may or may not be a related issue.
Hope this helps, --patrick $ ps auxw | grep tmux me 12001 0.0 0.1 1136 1920 ?? Ss 9:00PM 0:00.04 tmux: server (/tmp/tmux-1000/default) (tmux) me 32546 0.0 0.0 0 0 p1 Z+ - 0:00.00 (tmux) me 22096 0.0 0.0 976 1616 p1 S+ 9:00PM 0:00.02 tmux: client (/tmp/tmux-1000/default) (tmux) me 14412 0.0 0.0 420 952 p3 S+ 9:01PM 0:00.00 grep tmux