[xmonad] Bug with ghc's XFT binding?

hi, I'm using xmobar with xmonad. I found that it's hard to display Chinese characters in xmobar. So I made the following tests: Set up: 1. my system locale is en_US.utf-8 2. my xmobar is compiled with xft and utf8 support 3. in my xmobarrc, the font is set to be "xft:monospace-6" 3. in terminal, I run "cat | xmobar ~/.xmobarrc" The results: 1. English can be displayed well. But all Chinese characters are displayed in squares. 2. If I change the font in xmobarrc to be a Chinese font "xft:SimSun-6", then the display is correct. So I guess it might be a bug of xft binding in ghc's library. Do you have similiar experience in xmobar or someother programs? Regards Lars