Public bug reported:

When I migrate from Oneiric to Precise, wicd don't find hidden wifi network.
Visible network are grayed.
THis is the wicd-gtk traces :

$ wicd-client 
Has notifications support True
Loading...
Connecting to daemon...
Connected.
displaytray True
Done loading.
warning: ignoring exception org.freedesktop.DBus.Python.TypeError: Traceback 
(most recent call last):
  File "/usr/lib/python2.7/dist-packages/dbus/service.py", line 751, in 
_message_cb
    _method_reply_return(connection, message, method_name, signature, *retval)
  File "/usr/lib/python2.7/dist-packages/dbus/service.py", line 254, in 
_method_reply_return
    reply.append(signature=signature, *retval)
TypeError: expected string without null bytes

refreshing...
ESSID : MY_NETWORK
ESSID : <hidden>
Traceback (most recent call last):
  File "/usr/share/wicd/gtk/gui.py", line 587, in refresh_networks
    tempnet = WirelessNetworkEntry(x)
  File "/usr/share/wicd/gtk/netentry.py", line 882, in __init__
    "essid"))
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in 
call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Python.TypeError: Traceback 
(most recent call last):
  File "/usr/lib/python2.7/dist-packages/dbus/service.py", line 751, in 
_message_cb
    _method_reply_return(connection, message, method_name, signature, *retval)
  File "/usr/lib/python2.7/dist-packages/dbus/service.py", line 254, in 
_method_reply_return
    reply.append(signature=signature, *retval)
TypeError: expected string without null bytes

** Affects: wicd (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/996998

Title:
  wicd doesn't find networks after inserting hidden essid

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