abrt version: 1.1.14
architecture: i686
cmdline: python /usr/bin/archivemail -d100 -v -o /home/tcastano/amail imap://gcrespo:g72bri49.com/inbox
component: archivemail
executable: /usr/bin/archivemail
kernel: 2.6.35.10-74.fc14.i686
package: archivemail-0.7.2-4.fc12
reason: archivemail.py:1394:_archive_imap:AttributeError: 'NoneType' object has no attribute 'split'
release: Fedora release 14 (Laughlin)
time: 1299869347
uid: 500

backtrace
-----
archivemail.py:1394:_archive_imap:AttributeError: 'NoneType' object has no attribute 'split'

Traceback (most recent call last):
  File "/usr/bin/archivemail", line 6, in <module>
    main()
  File "/usr/share/archivemail/archivemail.py", line 701, in main
    archive(mailbox_path)
  File "/usr/share/archivemail/archivemail.py", line 1144, in archive
    _archive_imap(mailbox_name, final_archive_name)
  File "/usr/share/archivemail/archivemail.py", line 1394, in _archive_imap
    message_list = response[0].split()
AttributeError: 'NoneType' object has no attribute 'split'

Local variables in innermost frame:
roflag: None
imap_folder: 'inbox'
stats: <archivemail.Stats instance at 0xb7289e0c>
imap_str: 'username:password@server/inbox'
imap_username: 'username'
cache: <archivemail.IdentityCache instance at 0xb7289dec>
final_archive_name: '/home/tcastano/amail/inbox_archive'
imap_server: 'server'
archive: None
getpass: <module 'getpass' from '/usr/lib/python2.7/getpass.pyc'>
imap_filter: '(BEFORE 30-Nov-2010 UNFLAGGED)'
imap_password: 'password'
total_msg_count: 4967
imaplib: <module 'imaplib' from '/usr/lib/python2.7/imaplib.pyc'>
result: 'OK'
cStringIO: <module 'cStringIO' from '/usr/lib/python2.7/lib-dynload/cStringIO.so'>
imap_srv: <imaplib.IMAP4 instance at 0xb72951cc>
response: [None]
mailbox_name: 'imap://user:password@server/inbox'

How to reproduce
-----
1.using archivemail to archive a mailbox
2.
3.