http.client.BadStatusLine: '': Proxies?

$ apport-cli apport
*** Collecting problem information

The collected information can be sent to the developers to improve the
application. This might take a few minutes.
.........................Traceback (most recent call last):
  File "/usr/bin/apport-cli", line 366, in <module>
    if not app.run_argv():
  File "/usr/lib/python3/dist-packages/apport/ui.py", line 632, in run_argv
    return self.run_report_bug()
  File "/usr/lib/python3/dist-packages/apport/ui.py", line 434, in run_report_bug
    self.collect_info(symptom_script)
  File "/usr/lib/python3/dist-packages/apport/ui.py", line 1001, in collect_info
    bpthread.exc_raise()
  File "/usr/lib/python3/dist-packages/apport/REThread.py", line 64, in exc_raise
    raise self._exception[1].with_traceback(self._exception[2])
  File "/usr/lib/python3/dist-packages/apport/REThread.py", line 34, in run
    self._retval = self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 860, in search_bug_patterns
    f = urlopen(url)
  File "/usr/lib/python3.2/urllib/request.py", line 139, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/lib/python3.2/urllib/request.py", line 370, in open
    response = self._open(req, data)
  File "/usr/lib/python3.2/urllib/request.py", line 388, in _open
    '_open', req)
  File "/usr/lib/python3.2/urllib/request.py", line 348, in _call_chain
    result = func(*args)
  File "/usr/lib/python3.2/urllib/request.py", line 1160, in http_open
    return self.do_open(http.client.HTTPConnection, req)
  File "/usr/lib/python3.2/urllib/request.py", line 1145, in do_open
    r = h.getresponse()
  File "/usr/lib/python3.2/http/client.py", line 1052, in getresponse
    response.begin()
  File "/usr/lib/python3.2/http/client.py", line 346, in begin
    version, status, reason = self._read_status()
  File "/usr/lib/python3.2/http/client.py", line 316, in _read_status
    raise BadStatusLine(line)
http.client.BadStatusLine: ''
apport-cli apport 8.46s user 3.54s system 91% cpu 13.159 total

$ env | grep _proxy
socks_proxy=socks://localhost:1081/
http_proxy=http://localhost:1080/
https_proxy=https://www-cache....

$ apt-cache policy apport python3-httplib2
apport:
  Installed: 2.5.3-0ubuntu1
  Candidate: 2.5.3-0ubuntu1
  Version table:
 *** 2.5.3-0ubuntu1 0
        600 http://uk.archive.ubuntu.com/ubuntu/ quantal/main amd64 Packages
        100 /var/lib/dpkg/status
python3-httplib2:
  Installed: 0.7.4-2
  Candidate: 0.7.4-2
  Version table:
 *** 0.7.4-2 0
        600 http://uk.archive.ubuntu.com/ubuntu/ quantal/main amd64 Packages
        100 /var/lib/dpkg/status