"About Ubuntu" shows cubes with numbers in menu

[Thomas Rivera]

Binary package hint: yelp

When opening "About Ubuntu" the font used in the menu seems to be composed of boxes with numbers inside them. However some menu items such as "Find Next" and "Report a problem" are rendered in proper english, as well as shortcuts (F1, F2, etc..)
The system I used was upgraded to 10.10 from 10.04 after first installing all updates and pre-proposed updates before the upgrade.

lsb_release -rd
Description: Ubuntu maverick (development branch)
Release: 10.10

Attached is a Screenshot

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: yelp 2.30.1-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.35-17.23-generic 2.6.35.2
Uname: Linux 2.6.35-17-generic i686
NonfreeKernelModules: nvidia wl
Architecture: i386
Date: Wed Aug 25 00:12:25 2010
ExecutablePath: /usr/bin/yelp
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: yelp