Description of problem:
I just opend yumex. And did nothing.

Version-Release number of selected component:
yumex-3.0.10-2.fc19

Additional info:
reporter:       libreport-2.1.5
cmdline:        /usr/bin/python -E /usr/share/yumex/yum_childtask.py 2 True False /etc/yum.conf
dso_list:       yum-3.4.3-99.fc19.noarch
executable:     /usr/share/yumex/yum_childtask.py
kernel:         3.9.9-301.fc19.x86_64
runlevel:       N 5
uid:            0

Truncated backtrace:
misc.py:1017:write:IOError: [Errno 5] Eingabe-/Ausgabefehler

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 198, in __init__
    self._disable_multi_download() # disable parallel file download
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_server.py", line 225, in _disable_multi_download
    self.debug("disable multi : "+repo.id)
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_server.py", line 445, in debug
    self.write(":debug\t%s\t%s" % (msg, name))
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_server.py", line 355, in write
    sys.stdout.write("%s\n" % msg)
  File "/usr/lib/python2.7/site-packages/yum/misc.py", line 1017, in write
    self.stream.write(s)
IOError: [Errno 5] Eingabe-/Ausgabefehler

Local variables in innermost frame:
s: ':debug\tdisable multi : fedora\tyum_server._disable_multi_download\n'
self: <open file '<stdout>', mode 'w' at 0x7f2751a80150>