tmux won't run as non root user?

view full story

http://serverfault.com – If I run tmux as root, it runs normally and fully functional. I created a couple users, and it will not run as any of the users. create session failed: : No such file or directory I checked the outside $TERM is xterm and inside $TERM is screen as FAQs suggest that is most common cause of problems. I've used tmux regularly on many different systems, but I on this VPS I can't figure out what's up... A little help, please? EDIT: strace output (HowTos)