Facebook protocol missing from 'Add New Account' window

Binary package hint: pidgin-facebookchat

Steps to reproduce:
================

1. Install pidgin-facebookchat (version 1.69-2ubuntu1)
2. Start Pidgin, you should get the Buddies Window
3. From Accounts menu, click Account Manager
4. Click Add button
5. Click Protocol Dropdown - you notice that Facebook is missing

I looked on the homepage for this plugin and found this FAQ http://code.google.com/p/pidgin-facebookchat/wiki/FAQ, so I followed the instructions and my debug output shows:
(13:27:38) plugins: probing /usr/lib/pidgin/xmppdisco.so
(13:27:38) plugins: probing /usr/lib/pidgin/gestures.so
(13:27:38) plugins: probing /usr/lib/pidgin/extplacement.so
(13:27:38) plugins: probing /usr/lib/pidgin/iconaway.so
(13:27:38) plugins: probing /usr/lib/pidgin/convcolors.so
(13:27:38) plugins: probing /usr/lib/pidgin/sendbutton.so
(13:27:38) plugins: probing /usr/lib/pidgin/gtkbuddynote.so
(13:27:38) plugins: probing /usr/lib/pidgin/vvconfig.so
(13:27:38) plugins: probing /usr/lib/pidgin/pidgin-otr.so
(13:27:38) plugins: probing /usr/lib/pidgin/pidginrc.so
(13:27:38) plugins: probing /usr/lib/pidgin/history.so
(13:27:38) plugins: probing /usr/lib/pidgin/notify.so
(13:27:38) plugins: probing /usr/lib/pidgin/timestamp_format.so
(13:27:38) plugins: probing /usr/lib/pidgin/spellchk.so
(13:27:38) plugins: probing /usr/lib/pidgin/ticker.so
(13:27:38) plugins: probing /usr/lib/pidgin/cap.so
(13:27:38) plugins: probing /usr/lib/pidgin/xmppconsole.so
(13:27:38) plugins: probing /usr/lib/pidgin/timestamp.so
(13:27:38) plugins: probing /usr/lib/pidgin/themeedit.so
(13:27:38) plugins: probing /usr/lib/pidgin/musicmessaging.so
(13:27:38) plugins: probing /usr/lib/pidgin/markerline.so
(13:27:38) plugins: probing /usr/lib/purple-2/libmxit.so
(13:27:38) plugins: probing /usr/lib/purple-2/dbus-example.so
(13:27:38) plugins: probing /usr/lib/purple-2/libsimple.so
(13:27:38) plugins: probing /usr/lib/purple-2/libsametime.so
(13:27:38) plugins: probing /usr/lib/purple-2/libsilcpurple.so
(13:27:38) plugins: probing /usr/lib/purple-2/libicq.so
(13:27:38) plugins: probing /usr/lib/purple-2/idle.so
(13:27:38) plugins: probing /usr/lib/purple-2/log_reader.so
(13:27:38) plugins: probing /usr/lib/purple-2/libyahoo.so
(13:27:38) plugins: probing /usr/lib/purple-2/libmyspace.so
(13:27:38) plugins: probing /usr/lib/purple-2/perl.so
(13:27:38) plugins: probing /usr/lib/purple-2/libyahoojp.so
(13:27:38) plugins: probing /usr/lib/purple-2/joinpart.so
(13:27:38) plugins: probing /usr/lib/purple-2/statenotify.so
(13:27:38) plugins: probing /usr/lib/purple-2/buddynote.so
(13:27:38) plugins: probing /usr/lib/purple-2/pidgin-libnotify.so
(13:27:38) plugins: probing /usr/lib/purple-2/newline.so
(13:27:38) plugins: probing /usr/lib/purple-2/libfacebook.so
(13:27:38) plugins: /usr/lib/purple-2/libfacebook.so is not loadable: undefined symbol: json_array_get_length
(13:27:38) plugins: probing /usr/lib/purple-2/offlinemsg.so
(13:27:38) plugins: probing /usr/lib/purple-2/libjabber.so
(13:27:38) plugins: /usr/lib/purple-2/libjabber.so is not usable because the 'purple_init_plugin' symbol could not be found. Does the plugin call the PURPLE_INIT_PLUGIN() macro?
(13:27:38) plugins: probing /usr/lib/purple-2/ssl-nss.so
(13:27:38) plugins: probing /usr/lib/purple-2/libzephyr.so
(13:27:38) plugins: probing /usr/lib/purple-2/ssl.so
(13:27:38) plugins: probing /usr/lib/purple-2/libqq.so
(13:27:38) plugins: probing /usr/lib/purple-2/libaim.so
(13:27:38) plugins: probing /usr/lib/purple-2/libmsn.so
(13:27:38) plugins: probing /usr/lib/purple-2/libirc.so
(13:27:38) plugins: probing /usr/lib/purple-2/libymsg.so
(13:27:38) plugins: /usr/lib/purple-2/libymsg.so is not usable because the 'purple_init_plugin' symbol could not be found. Does the plugin call the PURPLE_INIT_PLUGIN() macro?
(13:27:38) plugins: probing /usr/lib/purple-2/libxmpp.so
(13:27:38) plugins: probing /usr/lib/purple-2/libgg.so
(13:27:38) plugins: probing /usr/lib/purple-2/libnovell.so
(13:27:38) plugins: probing /usr/lib/purple-2/psychic.so
(13:27:38) plugins: probing /usr/lib/purple-2/liboscar.so
(13:27:38) plugins: /usr/lib/purple-2/liboscar.so is not usable because the 'purple_init_plugin' symbol could not be found. Does the plugin call the PURPLE_INIT_PLUGIN() macro?
(13:27:38) plugins: probing /usr/lib/purple-2/tcl.so
(13:27:38) plugins: /usr/lib/purple-2/tcl.so is not loadable: libtk8.4.so.0: cannot open shared object file: No such file or directory
(13:27:38) plugins: probing /usr/lib/purple-2/autoaccept.so
(13:27:38) plugins: probing /usr/lib/purple-2/libbonjour.so

I wonder if this bug is linked to bug #756032

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: pidgin 1:2.7.11-1ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
CheckboxSubmission: ad9a15703e19217cb3448f881e125f6a
CheckboxSystem: abc83e3988b72e7c3a9b3aa684cb92fd
Date: Wed Jun 1 13:33:56 2011
ExecutablePath: /usr/bin/pidgin
ProcEnviron:
 LANGUAGE=he:en
 LANG=en_GB.utf8
 LC_MESSAGES=he_IL.UTF-8
 SHELL=/bin/bash
SourcePackage: pidgin
UpgradeStatus: Upgraded to natty on 2011-05-11 (20 days ago)