Setup
OS: Ubuntu 12.04 (Precise)
Hostname: foremanDEV.gateway.2wire.net

Running foreman-installer generates the following errors:

[ERROR 2014-03-23 16:05:03 main]  /Stage[main]/Apache::Service/Service[httpd]: Failed to call refresh: Could not start Service[httpd]: Execution of '/etc/init.d/apache2 start' returned 1:  at /usr/share/foreman-installer/modules/apache/manifests/service.pp:34
[ERROR 2014-03-23 16:05:11 main]  /Stage[main]/Foreman_proxy::Register/Foreman_smartproxy[foremanDEV.gateway.2wire.net]: Could not evaluate: Connection refused - connect(2)

More information about the error is found when manually attempting to start Apache:

# /etc/init.d/apache2 start
 * Starting web server apache2
Syntax error on line 38 of /etc/apache2/sites-enabled/05-foreman-ssl.conf:
SSLCertificateFile: file '/var/lib/puppet/ssl/certs/foremanDEV.gateway.2wire.net.pem' does not exist or is empty
Action 'start' failed.
The Apache error log may have more information.

The server name and cert files are correct in the .conf file

ServerName foremanDEV.gateway.2wire.net
SSLCertificateFile      /var/lib/puppet/ssl/certs/foremanDEV.gateway.2wire.net.pem
SSLCertificateKeyFile   /var/lib/puppet/ssl/private_keys/foremanDEV.gateway.2wire.net.pem

However, the filenames of the generated cert files are incorrectly cased

# ls /var/lib/puppet/ssl/certs
ca.pem    foremandev.gateway.2wire.net.pem

# ls /var/lib/puppet/ssl/private_keys
foremandev.gateway.2wire.net.pem