carlhuda/janus — Issue #321: Consider changing listchars to not include a UTF-8 character
Author: msabramo
Created: 2011-12-15 08:50:08+00:00
State: open

It's pretty easy to end up with an environment which is not properly configured for UTF-8. In my case, tmux and screen seem to act funny with UTF-8 characters.

http://marc-abramowitz.com/archives/2011/12/14/vim-screen-corruption-with-screentmux-and-matchparen-vim/

Other possible problems are incorrect locale or TERM settings or a vim compiled without mbyte support.