This is optional under The Unicode Standard, so I had it listed in a TODO/What's Next list instead of listed as a bug. The Unicode Standard 5.0, which was the authority for Unifont 5.1, allows "simply displaying nothing" (The Unicode Standard 5.0, p. 155). Using the space character as a replacement character was common in BDF fonts, and Unifont is a BDF font at heart. The space character was used in Unifont as a replacement character from its early days.
However, this is changed to U+FFFD in the latest upstream version. Paul Hardy -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org