It's not strictly unprintable characters that cause this -- I have these fonts installed, and the characters print correctly on my system. The line wrapping malfunction I describe still happens, though.
- Bug#273202: xterm: Chinese characters don't alw... Andrew Moise
- Bug#273202: xterm: Chinese characters don'... Thomas Dickey
- Bug#273202: xterm: Chinese characters ... Branden Robinson
- Processed: Re: Bug#273202: xterm: ... Debian Bug Tracking System
- Bug#273202: xterm: Chinese characters don'... Andrew Moise
- Bug#273202: xterm: Chinese characters ... Branden Robinson
- Processed: Re: Bug#273202: xterm: ... Debian Bug Tracking System