The (left,right)_seperators for me are | instead of the cool looking arrows. How do I enable these?
$ cp ~/.tmux/.tmux.conf.local ~/
Then edit `.tmux.conf.local` and uncomment the #tmux_conf_theme=powerline_patched_font line.
For the powerline symbol to work, you need patched fonts: https://github.com/Lokaltog/powerline-fonts