Comment 6 for bug 1317920

No, now it raise:

/etc/cron.daily/update-notifier-common:
Traceback (most recent call last):
  File "/usr/lib/update-notifier/package-data-downloader", line 239, in process_download_requests
    dest_file = urllib.urlretrieve(files[i])[0]
  File "/usr/lib/python2.7/urllib.py", line 94, in urlretrieve
    return _urlopener.retrieve(url, filename, reporthook, data)
  File "/usr/lib/python2.7/urllib.py", line 240, in retrieve
    fp = self.open(url, data)
  File "/usr/lib/python2.7/urllib.py", line 203, in open
    return self.open_unknown_proxy(proxy, fullurl, data)
  File "/usr/lib/python2.7/urllib.py", line 222, in open_unknown_proxy
    raise IOError, ('url error', 'invalid proxy for %s' % type, proxy)
IOError: [Errno url error] invalid proxy for http: '"http://proxy:8080/"'

I've tried without quotes (").