After upgrading screen from 3.9.13 to 3.9.13-r2, it won't start. $ screen Directory '/var/run/screen' must have mode 775. In the Changelog file, I found a related message: *screen-3.9.13-r2 (19 Dec 2002) 19 Dec 2002; Maik Schreiber <blizzy@gentoo.org> : Changed permissions of /var/run/screen to 0755 to satisfy screen when running in multi-user mode. I know that screen works fine with permission '775'. Is this correct?
screen-3.9.13-r3 should fix this.