This patch (included with xscreensaver-4.10-8.src.rpm from updates/enterprise/3desktop/) is apparently intended to omit uninstalled programs from the list in xscreensaver-demo -- but that's what the "ignoreUninstalledPrograms" preference does. You already set "ignoreUninstalledPrograms: True" in xscreensaver-4.06-rh.patch, so xscreensaver-4.10-skip-unavailable-hacks.patch is redundant. The only effect that the latter patch has is to make it impossible for users to set"ignoreUninstalledPrograms" to False, if that's what they prefer.
This bug is filed against RHEL 3, which is in maintenance phase. During the maintenance phase, only security errata and select mission critical bug fixes will be released for enterprise products. Since this bug does not meet that criteria, it is now being closed. For more information of the RHEL errata support policy, please visit: http://www.redhat.com/security/updates/errata/ If you feel this bug is indeed mission critical, please contact your support representative. You may be asked to provide detailed information on how this bug is affecting you.