Actually - thinking about it - wouldn't U+FFFE work?
- "Missing character" glyph Martin Kochanski
- Re: "Missing character" glyph Michael Everson
- Re: "Missing character" glyph Tom Gewecke
- Re: "Missing character" glyph Doug Ewell
- Re: "Missing character" glyph James Kass
- Re: "Missing character" glyph John H. Jenkins
- Re: "Missing character" glyph Michael Everson
- Re: "Missing character" glyph Martin Kochanski
- Re: "Missing character" glyph Otto Stolz
- Re: "Missing character" glyph Doug Ewell
- Re: "Missing character" glyph Asmus Freytag
- Re: "Missing character" glyph Doug Ewell
- Re: "Missing character" g... Doug Ewell
- Re: "Missing character&quo... Asmus Freytag
- Re: "Missing character... Tom Gewecke
- Re: "Missing character... Martin Kochanski
- Re: "Missing character" glyph Otto Stolz
- Re: "Missing character" g... Michael Everson