I encountered this bug after removing a reference to the UbuntuBeta Mono font from my .emacs file, and then removing the font(s) from my system. There is some other place where the font is being referenced, and I couldn't track it down after looking through dozens of files, including some compiled .elc files.
I encountered this bug after removing a reference to the UbuntuBeta Mono font from my .emacs file, and then removing the font(s) from my system. There is some other place where the font is being referenced, and I couldn't track it down after looking through dozens of files, including some compiled .elc files.
Reinstating the font is a workaround, not a fix.