Add one font = no X

So I added a font to /usr/share/fonts/corefonts.  The font is now visible to applications and works.  But, when I leave X, gdm starts spasming, load, crash, load, crash.  /var/log/Xorg.0.log has a line at the end stating "X: client 2 rejected from localhost".

I just added a font, and now I can't start X without it (and gdm) repeatedly crashing and restarting.  I've reinstalled X, gdm and just about everything else that I can think might be related, and nothing has fixed the problem.

Help!

Op here. It's gentoo, not ubuntu.