Comment 1 for bug 1309336

I forgot to add the following:

yum install gtkglext
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
 * base: mirror.rackspace.com
 * epel: linux.mirrors.es.net
 * extras: centos.mirrors.tds.net
 * rpmforge: mirror.nexcess.net
 * updates: linux.mirrors.es.net
Setting up Install Process
Package gtkglext-libs-1.2.0-11.el6.x86_64 already installed and latest version
Nothing to do