Description of problem:
I was attempting to do a Kickstart install. I had received many error messages regarding missing packages. From the looks of it, the repo lines in the Kickstart file were not getting used. In any event, I continued with the installation. I then received an error stating that @base didn't exist and shortly after that, this error occurred.
The following was filed automatically by anaconda:
anaconda 18.37.11 exception report
Traceback (most recent call first):
  File "/usr/lib64/python2.7/logging/__init__.py", line 328, in getMessage
    msg = msg % self.args
  File "/usr/lib64/python2.7/logging/__init__.py", line 464, in format
    record.message = record.getMessage()
  File "/usr/lib64/python2.7/logging/__init__.py", line 723, in format
    return fmt.format(record)
  File "/usr/lib64/python2.7/logging/handlers.py", line 791, in emit
    msg = self.format(record) + '\000'
  File "/usr/lib64/python2.7/site-packages/pyanaconda/anaconda_log.py", line 114, in emit
    SysLogHandler.emit(self, record)
  File "/usr/lib64/python2.7/logging/__init__.py", line 748, in handle
    self.emit(record)
  File "/usr/lib64/python2.7/logging/__init__.py", line 1308, in callHandlers
    hdlr.handle(record)
  File "/usr/lib64/python2.7/logging/__init__.py", line 1268, in handle
    self.callHandlers(record)
  File "/usr/lib64/python2.7/logging/__init__.py", line 1258, in _log
    self.handle(record)
  File "/usr/lib64/python2.7/logging/__init__.py", line 1184, in critical
    self._log(CRITICAL, msg, args, **kwargs)
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 3693, in selectGroup
    self.logger.critical(_('Group %s does have %u conditional packages, which may get installed.'), count_cond_test)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 1070, in _selectYumGroup
    self._yum.selectGroup(groupid, group_package_types=pkg_types)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 1198, in _applyYumSelections
    self._selectYumGroup(group.name, default=default, optional=optional)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 1229, in checkSoftwareSelection
    self._applyYumSelections()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 1316, in preInstall
    self.checkSoftwareSelection()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/install.py", line 124, in doInstall
    payload.preInstall(packages=packages, groups=payload.languageGroups(ksdata.lang.lang))
  File "/usr/lib64/python2.7/threading.py", line 504, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 91, in run
    threading.Thread.run(self, *args, **kwargs)
TypeError: not enough arguments for format string

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda
cmdline_file:   repo=http://download.fedoraproject.org/pub/fedora/linux/releases/18/Fedora/x86_64/os/ initrd=http://download.fedoraproject.org/pub/fedora/linux/releases/18/Fedora/x86_64/os/images/pxeboot/initrd.img ks=http://home01.oleary.home/ks/base.ks BOOT_IMAGE=http://download.fedoraproject.org/pub/fedora/linux/releases/18/Fedora/x86_64/os/images/pxeboot/vmlinuz 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.6.10-4.fc18.x86_64
other involved packages: 
package:        anaconda-18.37.11
product:        Fedora
release:        Cannot get release name.
type:           libreport
version:        18