diff --git a/addons/crm/crm.py b/addons/crm/crm.py
index cfeb163f110..891187f6a87 100644
--- a/addons/crm/crm.py
+++ b/addons/crm/crm.py
@@ -162,16 +162,16 @@ class crm_case_section(osv.osv):
         return res
     
     def create(self, cr, uid, vals, context=None):
-        alias_pool = self.pool.get('mail.alias')
+        mail_alias = self.pool.get('mail.alias')
         if not vals.get('alias_id'):
-            name = vals.pop('alias_name', None) or vals['name']
-            alias_id = alias_pool.create_unique_alias(cr, uid, 
-                    {'alias_name': name},
+            vals.pop('alias_name', None) # prevent errors during copy()
+            alias_id = mail_alias.create_unique_alias(cr, uid, 
+                    {'alias_name': vals['name']},
                     model_name="crm.lead",
                     context=context)
             vals['alias_id'] = alias_id
         res = super(crm_case_section, self).create(cr, uid, vals, context)
-        alias_pool.write(cr, uid, [vals['alias_id']],{'alias_defaults':{'section_id': res,'type':'lead'}},context)
+        mail_alias.write(cr, uid, [vals['alias_id']], {'alias_defaults': {'section_id': res, 'type':'lead'}}, context)
         return res
         
     def unlink(self, cr, uid, ids, context=None):
diff --git a/addons/mail/mail_group.py b/addons/mail/mail_group.py
index 19fe00107bd..3e8172f37b9 100644
--- a/addons/mail/mail_group.py
+++ b/addons/mail/mail_group.py
@@ -163,15 +163,17 @@ class mail_group(osv.osv):
         return self.message_subscribe(cr, uid, ids, user_ids, context=context)
 
     def create(self, cr, uid, vals, context=None):
-        alias_pool = self.pool.get('mail.alias')
+        mail_alias = self.pool.get('mail.alias')
         if not vals.get('alias_id'):
-            name = vals.get('alias_name') or vals['name']
-            alias_id = alias_pool.create_unique_alias(cr, uid, 
-                    {'alias_name': "group_"+name}, 
-                    model_name=self._name, context=context)
+            vals.pop('alias_name', None) # prevent errors during copy()
+            alias_id = mail_alias.create_unique_alias(cr, uid, 
+                          # Using '+' allows using subaddressing for those who don't
+                          # have a catchall domain setup.
+                          {'alias_name': "group+"+vals['name']},
+                          model_name=self._name, context=context)
             vals['alias_id'] = alias_id
         mail_group_id = super(mail_group, self).create(cr, uid, vals, context)
-        alias_pool.write(cr, uid, [vals['alias_id']], {"alias_force_thread_id": mail_group_id}, context)
+        mail_alias.write(cr, uid, [vals['alias_id']], {"alias_force_thread_id": mail_group_id}, context)
        
         if vals.get('group_ids'):
             self._subscribe_user_with_group_m2m_command(cr, uid, [mail_group_id], vals.get('group_ids'), context=context)
diff --git a/addons/mail/res_users.py b/addons/mail/res_users.py
index f0b987b369f..eb8ed33a9eb 100644
--- a/addons/mail/res_users.py
+++ b/addons/mail/res_users.py
@@ -86,13 +86,13 @@ class res_users(osv.osv):
             cr.execute('ALTER TABLE res_users ALTER COLUMN alias_id SET NOT NULL')
         except Exception:
             pass
-            
-    
+
     def create(self, cr, uid, data, context=None):
         # create default alias same as the login
         mail_alias = self.pool.get('mail.alias')
         alias_id = mail_alias.create_unique_alias(cr, uid, {'alias_name': data['login']}, model_name=self._name, context=context)
         data['alias_id'] = alias_id
+        data.pop('alias_name', None) # prevent errors during copy()
         user_id = super(res_users, self).create(cr, uid, data, context=context)
         mail_alias.write(cr, SUPERUSER_ID, [alias_id], {"alias_force_thread_id": user_id}, context)
 
diff --git a/addons/project/project.py b/addons/project/project.py
index 0af02cdf6b9..5cc21db15ba 100644
--- a/addons/project/project.py
+++ b/addons/project/project.py
@@ -524,11 +524,13 @@ def Project():
     def create(self, cr, uid, vals, context=None):
         mail_alias = self.pool.get('mail.alias')
         if not vals.get('alias_id'):
-            name = vals.pop('alias_name', None) or vals['name']
+            vals.pop('alias_name', None) # prevent errors during copy()
             alias_id = mail_alias.create_unique_alias(cr, uid, 
-                    {'alias_name': "project_"+short_name(name)},
-                    model_name=vals.get('alias_model', 'project.task'),
-                    context=context)
+                          # Using '+' allows using subaddressing for those who don't
+                          # have a catchall domain setup.
+                          {'alias_name': "project+"+vals['name']},
+                          model_name=vals.get('alias_model', 'project.task'),
+                          context=context)
             vals['alias_id'] = alias_id
         project_id = super(project, self).create(cr, uid, vals, context)
         mail_alias.write(cr, uid, [vals['alias_id']], {'alias_defaults': {'project_id': project_id} }, context)