diff --git a/addons/mail/models/mail_channel.py b/addons/mail/models/mail_channel.py
index 63bd82a5f87..9abaf4f1499 100644
--- a/addons/mail/models/mail_channel.py
+++ b/addons/mail/models/mail_channel.py
@@ -197,7 +197,7 @@ class Channel(models.Model):
         # http://blogs.technet.com/b/exchange/archive/2006/10/06/3395024.aspx
         headers['X-Auto-Response-Suppress'] = 'OOF'
         if self.alias_domain and self.alias_name:
-            headers['List-Id'] = '%s.%s' % (self.alias_name, self.alias_domain)
+            headers['List-Id'] = '<%s.%s>' % (self.alias_name, self.alias_domain)
             headers['List-Post'] = '<mailto:%s@%s>' % (self.alias_name, self.alias_domain)
             # Avoid users thinking it was a personal message
             # X-Forge-To: will replace To: after SMTP envelope is determined by ir.mail.server
diff --git a/addons/point_of_sale/models/pos_order.py b/addons/point_of_sale/models/pos_order.py
index 805763c4c5e..1c242f8d585 100644
--- a/addons/point_of_sale/models/pos_order.py
+++ b/addons/point_of_sale/models/pos_order.py
@@ -197,10 +197,14 @@ class PosOrder(models.Model):
         return InvoiceLine.sudo().create(inv_line)
 
     def _create_account_move_line(self, session=None, move=None):
-        def _flatten_tax_and_children(taxes):
+        def _flatten_tax_and_children(taxes, group_done=None):
             children = self.env['account.tax']
-            for tax in taxes:
-                children |= _flatten_tax_and_children(tax.children_tax_ids)
+            if group_done is None:
+                group_done = set()
+            for tax in taxes.filtered(lambda t: t.amount_type == 'group'):
+                if tax.id not in group_done:
+                    group_done.add(tax.id)
+                    children |= _flatten_tax_and_children(tax.children_tax_ids, group_done)
             return taxes + children
 
         # Tricky, via the workflow, we only have one id in the ids variable
diff --git a/addons/point_of_sale/static/src/js/screens.js b/addons/point_of_sale/static/src/js/screens.js
index 2d61f4b63a9..e64e12ffd38 100644
--- a/addons/point_of_sale/static/src/js/screens.js
+++ b/addons/point_of_sale/static/src/js/screens.js
@@ -1228,9 +1228,14 @@ var ClientListScreenWidget = ScreenWidget.extend({
             self.saved_client_details(partner_id);
         },function(err,event){
             event.preventDefault();
+            var error_body = _t('Your Internet connection is probably down.');
+            if (err.data) {
+                var except = err.data;
+                error_body = except.arguments && except.arguments[0] || except.message || error_body;
+            }
             self.gui.show_popup('error',{
                 'title': _t('Error: Could not Save Changes'),
-                'body': _t('Your Internet connection is probably down.'),
+                'body': error_body,
             });
         });
     },
diff --git a/addons/stock/models/product.py b/addons/stock/models/product.py
index c0094aea3c3..7adcdb992e0 100644
--- a/addons/stock/models/product.py
+++ b/addons/stock/models/product.py
@@ -371,8 +371,14 @@ class Product(models.Model):
     @api.multi
     def write(self, values):
         res = super(Product, self).write(values)
-        if 'active' in values and not values['active'] and self.mapped('orderpoint_ids').filtered(lambda r: r.active):
-            raise UserError(_('You still have some active reordering rules on this product. Please archive or delete them first.'))
+        if 'active' in values and not values['active']:
+            products = self.mapped('orderpoint_ids').filtered(lambda r: r.active).mapped('product_id')
+            if products:
+                msg = _('You still have some active reordering rules on this product. Please archive or delete them first.')
+                msg += '\n\n'
+                for product in products:
+                    msg += '- %s \n' % product.display_name
+                raise UserError(msg)
         return res
 
 class ProductTemplate(models.Model):