On Jun 03, 2013, at 01:35 PM, Barry Warsaw wrote:

>Here are some code excerpts.  My default face is customized:
>
>...
>(custom-set-faces
> ;; custom-set-faces was added by Custom.
> ;; If you edit it by hand, you could mess it up, so be careful.
> ;; Your init file should contain only one such instance.
> ;; If there is more than one, they won't work right.
> '(default ((t (:inherit nil :stipple nil :background "Grey27" :foreground "LightCyan" :inverse-video nil :box nil :strike-through nil :overline nil :underline nil :slant normal :weight normal :height 115 :width normal :foundry "unknown" :family "Monospace"))))
> ...

This appears to be related to the problem.  If I customize the default face
and set the family to Ubuntu Mono, then new frames inherit the correct font.

This isn't ideal because then I can't use the same Emacs startup files on
systems without the Ubuntu Mono font.

I still don't know whether this is intended behavior or a bug.

-Barry