abrt version: 1.1.14
architecture: i686
cmdline: /usr/bin/python /usr/share/yumex/yumex.pyc
component: yumex
executable: /usr/share/yumex/yumex.pyc
kernel: 2.6.35.10-74.fc14.i686
package: yumex-3.0.1-1.fc14
reason: yum_client.py:142:fatal:YumexBackendFatalError: None
release: Fedora release 14 (Laughlin)
time: 1295439110
uid: 500

backtrace
-----
yum_client.py:142:fatal:YumexBackendFatalError: None

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/yumexgui/__init__.py", line 1302, in on_packageFilter_changed
    pkgs = self.backend.get_packages(active)
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_backend.py", line 355, in get_packages
    pkgs = YumClient.get_packages(self, flt, show_dupes)
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_client.py", line 564, in get_packages
    return self.execute_command('get-packages', [str(pkg_filter), str(show_dupes)])
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_client.py", line 543, in execute_command
    pkgs = self._get_list()
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_client.py", line 420, in _get_list
    cmd, args = self._readline()
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_client.py", line 324, in _readline
    self.fatal(args)
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_client.py", line 142, in fatal
    raise YumexBackendFatalError(err, msg)
YumexBackendFatalError: None

Local variables in innermost frame:
msg: 'backend not running as expected (yumex will close)'
self: <yumexbackend.yum_backend.YumexBackendYum object at 0x990162c>
args: ['backend-not-running', 'UydiYWNrZW5kIG5vdCBydW5uaW5nIGFzIGV4cGVjdGVkICh5dW1leCB3aWxsIGNsb3NlKScKcDAKLg==']
lines: []
err: 'backend-not-running'

How to reproduce
-----
1. I was killing yum and yumex process with kill -9
2.
3.