#12 wrong x11 title set for utf directories

[Anatoly Asviyan]

I set my bash prompt to display current directory in a
window title PS1="\[\033]0;\w \u@\h\007\]"

when i cd into directory with containing non-english chars
urxvt displays its name wrong. dir name is valid utf string

gnome-terminal, mlterm, and rox show this dir name properly