diff --git a/addons/mail/mail_group.py b/addons/mail/mail_group.py
index 40c63268704..da53b3ae42e 100644
--- a/addons/mail/mail_group.py
+++ b/addons/mail/mail_group.py
@@ -37,6 +37,7 @@ class mail_group(osv.osv):
     subscription/follow mechanism of OpenSocial.
     """
     
+    _description = 'Discussion group'
     _name = 'mail.group'
     _inherit = ['mail.thread']
     
@@ -72,12 +73,26 @@ class mail_group(osv.osv):
                 result[group.id] = self._photo_resize(cr, uid, group.photo_big, context=context)
         return result
     
-    def is_subscriber(self, cr, uid, ids, name, args, context=None):
-        result = {}
+    def get_member_ids(self, cr, uid, ids, field_names, args, context=None):
+        if context is None:
+            context = {}
+        result = dict.fromkeys(ids)
         for id in ids:
-            result[id] = self.message_is_subscriber(cr, uid, [id], context=context)
+            result[id] = {}
+            result[id]['member_ids'] = self.message_get_subscribers_ids(cr, uid, [id], context=context)
+            result[id]['member_nbr'] = len(result[id]['member_ids'])
+            result[id]['is_member'] = uid in result[id]['member_ids']
         return result
     
+    def search_member_ids(self, cr, uid, obj, name, args, context=None):
+        if context is None:
+            context = {}
+        sub_obj = self.pool.get('mail.subscription')
+        sub_ids = sub_obj.search(cr, uid, ['&', ('res_model', '=', obj._name), ('user_id', '=', args[0][2])], context=context)
+        subs = sub_obj.read(cr, uid, sub_ids, context=context)
+        obj_ids = [sub['res_id'] for sub in subs]
+        return [('id', 'in', obj_ids)]
+    
     def get_last_month_msg_nbr(self, cr, uid, ids, name, args, context=None):
         result = {}
         message_obj = self.pool.get('mail.message')
@@ -86,12 +101,6 @@ class mail_group(osv.osv):
             result[id] = message_obj.search(cr, uid, ['&', '&', ('model', '=', self._name), ('res_id', 'in', ids), ('date', '>=', lower_date)], count=True, context=context)
         return result
     
-    def get_members_nbr(self, cr, uid, ids, name, args, context=None):
-        result = {}
-        for id in ids:
-            result[id] = len(self.message_get_subscribers_ids(cr, uid, [id], context=context))
-        return result
-    
     def _get_default_photo(self, cr, uid, context=None):
         avatar_path = openerp.modules.get_module_resource('mail', 'static/src/img', 'groupdefault.png')
         return self._photo_resize(cr, uid, open(avatar_path, 'rb').read().encode('base64'), context=context)
@@ -107,9 +116,11 @@ class mail_group(osv.osv):
             store = {
                 'mail.group': (lambda self, cr, uid, ids, c={}: ids, ['photo_big'], 10),
             }, help='Field holding the automatically resized (128x128) PIL-supported and base64 encoded version of the group image.'),
-        'joined': fields.function(is_subscriber, type='boolean', string='Joined'),
+        'member_ids': fields.function(get_member_ids, fnct_search=search_member_ids, type='many2many',
+                        relation='res.users', string='Members', multi='get_member_ids'),
+        'member_nbr': fields.function(get_member_ids, type='integer', string='Member count', multi='get_member_ids'),
+        'is_member': fields.function(get_member_ids, type='boolean', string='Joined', multi='get_member_ids'),
         'last_month_msg_nbr': fields.function(get_last_month_msg_nbr, type='integer', string='Messages count for last month'),
-        'members_nbr': fields.function(get_members_nbr, type='integer', string='Members count'),
     }
 
     _defaults = {
diff --git a/addons/mail/mail_group_view.xml b/addons/mail/mail_group_view.xml
index 975b3cfd9ac..9e38ddd69d8 100644
--- a/addons/mail/mail_group_view.xml
+++ b/addons/mail/mail_group_view.xml
@@ -17,17 +17,18 @@
                             </div>
                         </t>
                         <t t-name="kanban-box">
-                            <div t-attf-class="{record.joined.raw_value} oe_group_vignette">
+                            <div t-attf-class="{record.is_member.raw_value} oe_group_vignette">
                                 <div class="oe_group_image">
                                     <a type="edit"><img t-att-src="kanban_image('mail.group', 'photo', record.id.value)" class="oe_group_photo" tooltip="kanban-description"/></a>
                                 </div>
                                 <div class="oe_group_details">
                                     <h4><a type="edit"><field name="name"/></a></h4>
-                                    <span style="display: none;"><field name="joined"/></span>
+                                    <span style="display: none;"><field name="is_member"/></span>
                                     <ul>
-                                        <li><field name="members_nbr"/> members</li>
-                                        <li t-if="! record.joined.raw_value"><a name="action_group_join" string="Join" type="object" class="oe_group_join">Not following</a></li>
-                                        <li t-if="record.joined.raw_value"><a name="action_group_leave" string="Join" type="object" class="oe_group_leave">Following</a></li>
+                                        <li><field name="member_nbr"/> members</li>
+                                        <li><t t-esc="record.is_member"></t></li>
+                                        <li t-if="! record.is_member.raw_value"><a name="action_group_join" string="Join" type="object" class="oe_group_join">Not following</a></li>
+                                        <li t-if="record.is_member.raw_value"><a name="action_group_leave" string="Join" type="object" class="oe_group_leave">Following</a></li>
                                         <li><field name="last_month_msg_nbr"/> messages last month</li>
                                     </ul>
                                 </div>