couldn't find post_form_id

I can't connect to my Facebook account using this plugin.

Here is what the debug window says:
(12:10:00) account: Connecting to account <email address hidden>.
(12:10:00) connection: Connecting. gc = 0x22f8dcf0
(12:10:00) facebook: getting url /login.php?login_attempt=1&_fb_noscript=1
(12:10:00) dnsquery: Performing DNS lookup for login.facebook.com
(12:10:00) dns: Wait for DNS child 10339 failed: Aucun processus enfant
(12:10:00) dns: Created new DNS child 10704, there are now 1 children.
(12:10:00) dns: Successfully sent DNS request to child 10704
(12:10:00) dns: Got response for 'login.facebook.com'
(12:10:00) dnsquery: IP resolved for login.facebook.com
(12:10:00) proxy: Attempting connection to 66.220.147.53
(12:10:00) proxy: Connecting to login.facebook.com:443 with no proxy
(12:10:00) proxy: Connection in progress
(12:10:00) proxy: Connecting to login.facebook.com:443.
(12:10:00) proxy: Connected to login.facebook.com:443.
(12:10:00) nss: subject=CN=login.facebook.com,OU=Domain Control Validated - QuickSSL Premium(R),OU=See www.geotrust.com/resources/cps (c)09,OU=GT04482452,O=login.facebook.com,C=US issuer=OU=Equifax Secure Certificate Authority,O=Equifax,C=US
(12:10:00) nss: subject=OU=Equifax Secure Certificate Authority,O=Equifax,C=US issuer=OU=Equifax Secure Certificate Authority,O=Equifax,C=US
(12:10:00) certificate/x509/tls_cached: Starting verify for login.facebook.com
(12:10:00) certificate/x509/tls_cached: Checking for cached cert...
(12:10:00) certificate/x509/tls_cached: ...Found cached cert
(12:10:00) nss/x509: Loading certificate from /home/pierre/.purple/certificates/x509/tls_peers/login.facebook.com
(12:10:00) certificate/x509/tls_cached: Peer cert matched cached
(12:10:00) nss/x509: Exporting certificate to /home/pierre/.purple/certificates/x509/tls_peers/login.facebook.com
(12:10:00) util: Writing file /home/pierre/.purple/certificates/x509/tls_peers/login.facebook.com
(12:10:00) certificate: Successfully verified certificate for login.facebook.com
(12:10:00) facebook: post_or_get_ssl_connect_cb
(12:10:01) facebook: executing callback for /login.php?login_attempt=1&_fb_noscript=1
(12:10:01) facebook: uid 698658147
(12:10:01) pidgin-libnotify: event_connection_throttle() called
(12:10:01) facebook: getting url /ajax/home/groups.php?__a=1
(12:10:01) dnsquery: Performing DNS lookup for www.facebook.com
(12:10:01) dnsquery: Performing DNS lookup for www.facebook.com
(12:10:01) facebook: getting url /presence/popout.php
(12:10:01) dnsquery: Performing DNS lookup for www.facebook.com
(12:10:01) dnsquery: Performing DNS lookup for www.facebook.com
(12:10:01) facebook: getting url /reqs.php
(12:10:01) dnsquery: Performing DNS lookup for www.facebook.com
(12:10:01) dnsquery: Performing DNS lookup for www.facebook.com
(12:10:01) facebook: getting url /ajax/chat/buddy_list.php
(12:10:01) facebook: sending request data:
user=698658147&popped_out=true&force_render=true&buddy_list=1&__a=1&post_form_id_source=AsyncRequest&post_form_id=(null)&fb_dtsg=(null)&notifications=1
(12:10:01) dnsquery: Performing DNS lookup for www.facebook.com
(12:10:01) dnsquery: Performing DNS lookup for www.facebook.com
(12:10:01) facebook: getting url /ajax/intent.php?filter=app_2915120374&request_type=1&__a=1&newest=0&ignore_self=true
(12:10:01) dnsquery: Performing DNS lookup for www.facebook.com
(12:10:01) dnsquery: Performing DNS lookup for www.facebook.com
(12:10:01) facebook: getting url /ajax/typeahead_search.php?u=698658147&__a=1
(12:10:01) dnsquery: Performing DNS lookup for www.facebook.com
(12:10:01) dnsquery: Performing DNS lookup for www.facebook.com
(12:10:01) dns: Successfully sent DNS request to child 10704
(12:10:01) dns: Created new DNS child 10705, there are now 2 children.
(12:10:01) dns: Successfully sent DNS request to child 10705
(12:10:01) dns: Created new DNS child 10706, there are now 3 children.
(12:10:01) dns: Successfully sent DNS request to child 10706
(12:10:01) dns: Created new DNS child 10707, there are now 4 children.
(12:10:01) dns: Successfully sent DNS request to child 10707
(12:10:01) dns: Got response for 'www.facebook.com'
(12:10:01) dnsquery: IP resolved for www.facebook.com
(12:10:01) dns: Successfully sent DNS request to child 10704
(12:10:01) dns: Got response for 'www.facebook.com'
(12:10:01) dnsquery: IP resolved for www.facebook.com
(12:10:01) proxy: Attempting connection to 69.171.229.13
(12:10:01) proxy: Connecting to www.facebook.com:80 with no proxy
(12:10:01) proxy: Connection in progress
(12:10:01) dns: Successfully sent DNS request to child 10705
(12:10:01) dns: Got response for 'www.facebook.com'
(12:10:01) dnsquery: IP resolved for www.facebook.com
(12:10:01) dns: Successfully sent DNS request to child 10706
(12:10:01) dns: Got response for 'www.facebook.com'
(12:10:01) dnsquery: IP resolved for www.facebook.com
(12:10:01) proxy: Attempting connection to 69.171.229.13
(12:10:01) proxy: Connecting to www.facebook.com:80 with no proxy
(12:10:01) proxy: Connection in progress
(12:10:01) dns: Successfully sent DNS request to child 10707
(12:10:01) dns: Got response for 'www.facebook.com'
(12:10:01) dnsquery: IP resolved for www.facebook.com
(12:10:01) dns: Successfully sent DNS request to child 10704
(12:10:01) dns: Got response for 'www.facebook.com'
(12:10:01) dnsquery: IP resolved for www.facebook.com
(12:10:01) proxy: Attempting connection to 69.171.229.13
(12:10:01) proxy: Connecting to www.facebook.com:80 with no proxy
(12:10:01) proxy: Connection in progress
(12:10:01) dns: Successfully sent DNS request to child 10705
(12:10:01) dns: Got response for 'www.facebook.com'
(12:10:01) dnsquery: IP resolved for www.facebook.com
(12:10:01) dns: Successfully sent DNS request to child 10706
(12:10:01) dns: Got response for 'www.facebook.com'
(12:10:01) dnsquery: IP resolved for www.facebook.com
(12:10:01) proxy: Attempting connection to 69.171.229.13
(12:10:01) proxy: Connecting to www.facebook.com:80 with no proxy
(12:10:01) proxy: Connection in progress
(12:10:01) dns: Successfully sent DNS request to child 10707
(12:10:01) dns: Got response for 'www.facebook.com'
(12:10:01) dnsquery: IP resolved for www.facebook.com
(12:10:01) dns: Got response for 'www.facebook.com'
(12:10:01) dnsquery: IP resolved for www.facebook.com
(12:10:01) proxy: Attempting connection to 69.171.229.13
(12:10:01) proxy: Connecting to www.facebook.com:80 with no proxy
(12:10:01) proxy: Connection in progress
(12:10:01) dns: Got response for 'www.facebook.com'
(12:10:01) dnsquery: IP resolved for www.facebook.com
(12:10:01) dns: Got response for 'www.facebook.com'
(12:10:01) dnsquery: IP resolved for www.facebook.com
(12:10:01) proxy: Attempting connection to 69.171.229.13
(12:10:01) proxy: Connecting to www.facebook.com:80 with no proxy
(12:10:01) proxy: Connection in progress
(12:10:01) proxy: Connecting to www.facebook.com:80.
(12:10:01) proxy: Connected to www.facebook.com:80.
(12:10:01) proxy: Connecting to www.facebook.com:80.
(12:10:01) proxy: Connected to www.facebook.com:80.
(12:10:01) proxy: Connecting to www.facebook.com:80.
(12:10:01) proxy: Connected to www.facebook.com:80.
(12:10:01) proxy: Connecting to www.facebook.com:80.
(12:10:01) proxy: Connected to www.facebook.com:80.
(12:10:01) proxy: Connecting to www.facebook.com:80.
(12:10:01) proxy: Connected to www.facebook.com:80.
(12:10:01) proxy: Connecting to www.facebook.com:80.
(12:10:01) proxy: Connected to www.facebook.com:80.
(12:10:01) facebook: executing callback for /ajax/home/groups.php?__a=1
(12:10:01) facebook: executing callback for /presence/popout.php
(12:10:01) facebook: couldn't find post_form_id
(12:10:01) facebook: page content:
(12:10:01) connection: Connection error on 0x22f8dcf0 (reason: 2 description: Error getting info from Facebook.)
(12:10:01) facebook: executing callback for /reqs.php
(12:10:01) g_log: fb_check_friend_request_cb: assertion `data_len > 0' failed
(12:10:01) account: Disconnecting account <email address hidden> (0x22d2dd88)
(12:10:01) connection: Disconnecting connection 0x22f8dcf0
(12:10:01) facebook: disconnecting account
(12:10:01) facebook: unloading plugin
(12:10:01) facebook: destroying 0 waiting connections
(12:10:01) facebook: destroying 3 incomplete connections
(12:10:01) connection: Destroying connection 0x22f8dcf0
(12:10:02) util: Writing file accounts.xml to directory /home/pierre/.purple
(12:10:02) util: Writing file /home/pierre/.purple/accounts.xml
(12:10:02) util: Writing file blist.xml to directory /home/pierre/.purple
(12:10:02) util: Writing file /home/pierre/.purple/blist.xml

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: pidgin-facebookchat 1.69-2ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
Uname: Linux 3.0.0-14-generic i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Mon Jan 9 12:08:25 2012
SourcePackage: pidgin-facebookchat
UpgradeStatus: No upgrade log present (probably fresh install)