Version-Release number of selected component:
yumex-3.0.10-1.fc18

Additional info:
cmdline:        /usr/bin/python -E /usr/share/yumex/yum_childtask.py 2 True False /etc/yum.conf
dso_list:       yum-3.4.3-54.fc18.noarch
executable:     /usr/share/yumex/yum_childtask.py
kernel:         3.9.2-200.fc18.i686
uid:            0
ureports_counter: 1

Truncated backtrace:
config.py:990:readStartupConfig:ConfigError: Parsing file failed: File contains parsing errors: file:///etc/yum.conf
	[line 25]: export http_proxy

Traceback (most recent call last):
  File "/usr/share/yumex/yum_childtask.py", line 66, in <module>
    my = YumServer(debuglevel, plugins, offline, repos, yum_conf)
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_server.py", line 187, in __init__
    self.doLock()
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_server.py", line 268, in doLock
    yum.YumBase.doLock(self)
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1997, in doLock
    if self.conf.uid != 0:
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1018, in <lambda>
    conf = property(fget=lambda self: self._getConfig(),
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 337, in _getConfig
    startupconf = config.readStartupConfig(fn, root, releasever)
  File "/usr/lib/python2.7/site-packages/yum/config.py", line 990, in readStartupConfig
    raise Errors.ConfigError("Parsing file failed: %s" % e)
ConfigError: Parsing file failed: File contains parsing errors: file:///etc/yum.conf
	[line 25]: export http_proxy

Local variables in innermost frame:
e: File contains parsing errors: file:///etc/yum.conf
	[line 25]: export http_proxy
confpp_obj: <yum.parser.ConfigPreProcessor instance at 0xb6d494ac>
parser: <iniparse.compat.RawConfigParser object at 0xb6d4938c>
configfile: '/etc/yum.conf'
startupconf: <yum.config.StartupConf object at 0xb6d4936c>
releasever: None
root: '/'