WARNING: Glyph "?" (0xfffd) not available in font "Frutiger-LightItalic".

When I upgraded from DocBook 4.5 to 5.0, I noticed that I get this font warning when I build using FOP. I haven't changed the version of FOP or the fonts on my system.

 

The glyph in question is used as a separator character between the page number and heading in the footer. However, I can't find anywhere in the DocBook stylesheets where this separator character is defined. Can anyone help me find it so
that I adjust the font for that charactter accordingly?

 

Regards,

Jeff