current directory doesn't appear in title bar when running under screen

Answer 1

I think there is no direct way, because of the way screen works. However screen can display its own status bar, that you can define in .screenrc. Here's mine for instance :

hardstatus alwayslastline
 hardstatus string '%{= kG}[ %{G}%H %{g}][%=%{=kw}%?%-Lw%?%{r}(%{W}%n*%f%t%?(%u)%?%{r})%{w}%?%+Lw%?%?%= %{g}][%{B}%Y-%m-%d %{W}%c %{g}]'