Service Discovery in ejabberd 2.0.1 from Debian Lenny

My ejabberd installation is working fine, with three small glitches.

My setup in short:
- Debian Lenny (up to date)
- ejabberd 2.0.1, with custom mods: mod_asterisk and mod_shared_roster_ldap
- clients: Pidgin 2.6.5 and Psi (from 0.13 to 0.14) - various Linux distros
- all in one subnet, with local DNS server, no firewalls

Fist, service discovery seems not to be working. Tested with PSI 0.14 on ArchLinux x86.
Second, ad-hoc commands not working, they do not appear in Pidgin or I get a "not implemented" error with a return code (501 or 503, sorry I don't remember and they're not there ATM :-)
Third, searching in vcards (from LDAP) not returning any results.

I would like to address the first problem, I've been browsing the forums and Google but I haven't found any clue.
My config (edited - domain name changed) and logs (with loglevel 4, if needed I'll get more verbose logs):

ejabberd.cfg

override_global.
override_local.
override_acls.
{acl, admin, {user, "admin", "jabber.example.com"}}.
{hosts, ["jabber.example.com"]}.
{loglevel, 4}.
{listen,
 [
  {5222, ejabberd_c2s, [
			{ip, {1,2,9,144}},
			{access, c2s},
			{shaper, c2s_shaper},
			{max_stanza_size, 65536},
			starttls, {certfile, "/etc/ejabberd/ejabberd.pem"}
		       ]},
  {5269, ejabberd_s2s_in, [
			{ip, {1,2,9,144}},
			   {shaper, s2s_shaper},
			   {max_stanza_size, 131072}
			  ]},
  {5280, ejabberd_http, [
			 http_poll,
			 web_admin
			]}

 ]}.
{s2s_use_starttls, true}.
{s2s_certfile, "/etc/ejabberd/ejabberd.pem"}.
{sasl_realm, "EXAMPLE.COM"}.
{sasl_fqdn, "jabber.example.com"}.
{host_config, "jabber.example.com", [
        {auth_method, [internal]},
        {ldap_servers, ["1.2.9.9"]},
        {ldap_port, 389},
        {ldap_base, "ou=People,dc=example,dc=com"}
        ]}.
{odbc_server, {pgsql, "localhost", "ejabberd", "ejabberd", ""}}.
{shaper, normal, {maxrate, 1000}}.
{shaper, fast, {maxrate, 50000}}.
{acl, admin, {user, "superuser", "jabber.example.com"}}.
{acl, local, {user_regexp, ""}}.
{access, max_user_sessions, [{10, all}]}.
{access, local, [{allow, local}]}.
{access, c2s, [{deny, blocked},
	       {allow, all}]}.
{access, c2s_shaper, [{none, admin},
		      {normal, all}]}.
{access, s2s_shaper, [{fast, all}]}.
{access, announce, [{allow, admin}]}.
{access, configure, [{allow, admin}]}.
{access, muc_admin, [{allow, admin}]}.
{access, muc, [{allow, all}]}.
{access, register, [{deny, all}]}.
{access, pubsub_createnode, [{allow, all}]}.
{language, "pl"}.
{modules,
 [
  {mod_adhoc,    []},
  {mod_announce, [{access, announce}]}, % requires mod_adhoc
  {mod_caps,     []},
  {mod_configure,[]}, % requires mod_adhoc
  {mod_ctlextra, []},
  {mod_disco,    [
	{extra_domains, ["jabber.example.com"]},
	{server_info, [
		{all, "abuse-addresses", ["mailto:superuser@example.com"]},
		{[mod_disco], "feedback-addresses",["mailto:superuser@example.com"]},
		{[mod_disco], "admin-addresses", ["mailto:superuser@example.com"]}
	]}
  ]},
  %%{mod_echo,   [{host, "echo.localhost"}]},
  %%{mod_irc,      []},
  {mod_last_odbc,     []},
  {mod_muc,      [
		  %%{host, "conference.@HOST@"},
		  {access, muc},
		  {access_create, muc},
		  {access_persistent, muc},
		  {access_admin, muc_admin},
		  {max_users, 500}
		 ]},
  %%{mod_muc_log,[]},
  {mod_offline_odbc,  []},
  %%{mod_privacy_odbc,  []},
  %%{mod_private_odbc,  []},
  {mod_ping, []},
  {mod_proxy65,  [
		  {access, local},
		  {shaper, c2s_shaper}
		 ]},
%%  {mod_pubsub,   [
%%		  {access_createnode, pubsub_createnode},
%%		  {plugins, ["dag", "flat", "hometree", "pep"]}
%%		 ]},
  {mod_register, [
		  {welcome_message, {"Welcome!",
				     "Welcome to a Jabber service powered by Debian. "
				     "For information about Jabber visit "
				     "http://www.jabber.org"}},
		  {registration_watchers, ["superuser@jabbers.example.com"]},

		  {access, register}
		 ]},
  {mod_roster_odbc,   [{versioning, true}, {store_current_id, true}]},
  %%{mod_service_log,[]},
  %%{mod_shared_roster,[]},
  {mod_shared_roster_ldap,[
        {ldap_servers, ["1.2.9.9"]},
        {ldap_port, 389},
        {ldap_base, "ou=AddressBook,dc=example,dc=com"},
	{ldap_rfilter, "(objectClass=organizationalUnit)"},
	{ldap_gfilter, "(&(seeAlso=*)(ou=%g))"},
	{ldap_groupattr, "ou"},
	{ldap_groupdesc, "ou"},
	{ldap_memberattr, "seeAlso"},
	{ldap_memberattr_format, "uid=%u,ou=People,dc=example,dc=com"},
	{ldap_userdesc, "cn"}
  ]},
  {mod_stats,    []},
  {mod_time,     []},
  {mod_vcard,   []},
  {mod_vcard_ldap,   [
    {ldap_rootdn, ""},
    {ldap_password, ""},
    {ldap_base, "ou=AddressBook,dc=example,dc=com"},
    {ldap_uids, [{"seeAlso", "uid=%u,ou=People,dc=example,dc=com"}]},
    {ldap_filter, ""},
    {ldap_vcard_map,
	[{"NICKNAME", "%s", ["displayName"]},
	 {"FN", "%s", ["displayName"]},
	 {"LAST", "%s", ["sn"]},
	 {"FIRST", "%s", ["givenName"]},
	 {"MIDDLE", "%s", ["initials"]},
	 {"ORGNAME", "%s", ["o"]},
	 {"ORGUNIT", "%s", ["ou"]},
	 {"CTRY", "%s", ["c"]},
	 {"LOCALITY", "%s", ["l"]},
	 {"STREET", "%s", ["street"]},
	 {"REGION", "%s", ["st"]},
	 {"PCODE", "%s", ["postalCode"]},
	 {"TITLE", "%s", ["title"]},
	 {"URL", "%s", ["labeleduri"]},
	 {"DESC", "%s", ["description"]},
	 {"TEL", "%s", ["telephoneNumber"]},
	 {"EMAIL", "%s", ["mail"]},
	 {"BDAY", "%s", ["birthDay"]},
	 {"ROLE", "%s", ["employeeType"]},
	 {"PHOTO", "%s", ["jpegPhoto"]}]
    }
		]},
  {mod_version,  []},
  {mod_asterisk, [
	{cmd,"+"},
	{ami_host,"1.2.3.140"},
	{ami_port,5038},
	{ami_login,""},
	{ami_password,""}
  ]}
 ]}.

ejabberd.log

=ERROR REPORT==== 2010-01-19 13:49:36 ===
** Generic server ejabberd_local terminating 
** Last message in was {register_iq_response_handler,"jabber.example.com",
                           "2356691199",mod_caps,handle_disco_response}
** When Server state == {state}
** Reason for termination == 
** {aborted,{bad_type,{iq_response,"2356691199",mod_caps,
                                   handle_disco_response}}}

=ERROR REPORT==== 2010-01-19 13:49:36 ===
** Generic server 'ejabberd_mod_caps_jabber.example.com' terminating 
** Last message in was {'$gen_cast',
                           {note_caps,
                               {jid,"superuser","jabber.example.com","Psi",
                                   "superuser","jabber.example.com","Psi"},
                               {caps,"http://psi-im.org/caps",
                                   "0.13-dev-rev2",
                                   ["cs","ep-notify","html"]}}}
** When Server state == {state,"jabber.example.com",
                               {dict,0,16,16,8,80,48,
                                     {[],[],[],[],[],[],[],[],[],[],[],[],[],
                                      [],[],[]},
                                     {{[],[],[],[],[],[],[],[],[],[],[],[],[],
                                       [],[],[]}}},
                               []}
** Reason for termination == 
** {badarg,[{ejabberd_local,register_iq_response_handler,4},
            {mod_caps,'-handle_cast/2-fun-2-',5},
            {lists,foldl,3},
            {mod_caps,handle_cast,2},
            {gen_server,handle_msg,5},
            {proc_lib,init_p,5}]}

sasl.log