On some locales with 8-bit charsers, the 'readline' library
still treat these symbols as Meta-characters.
As result, for example, bash can't input russian filenames.
Could you set up INPUTRC= on every shell start :
INPUTRC="/etc/inputrc"; export INPUTRC
set meta-flag on
set convert-meta off
set output-meta on
input already should be set up by the various invocations
of bashrc and /etc/profile; there is a default inputrc
that will be read if $HOME/.inputrc doesn't exist.