diff --git a/addons/mail/mail_mail.py b/addons/mail/mail_mail.py
index 084b8d796fb..556d66cf447 100644
--- a/addons/mail/mail_mail.py
+++ b/addons/mail/mail_mail.py
@@ -26,6 +26,8 @@ from email.utils import formataddr
 from urllib import urlencode
 from urlparse import urljoin
 
+import psycopg2
+
 from openerp import tools
 from openerp import SUPERUSER_ID
 from openerp.addons.base.ir.ir_mail_server import MailDeliveryException
@@ -318,6 +320,12 @@ class mail_mail(osv.Model):
                                       'Consider raising the --limit-memory-hard startup option',
                                   mail.id, mail.message_id)
                 raise
+            except psycopg2.Error:
+                # If an error with the database occurs, chances are that the cursor is unusable.
+                # This will lead to an `psycopg2.InternalError` being raised when trying to write
+                # `state`, shadowing the original exception and forbid a retry on concurrent
+                # update. Let's bubble it.
+                raise
             except Exception as e:
                 _logger.exception('failed sending mail.mail %s', mail.id)
                 mail.write({'state': 'exception'})
diff --git a/addons/note/security/note_security.xml b/addons/note/security/note_security.xml
index 8fedb29ea2e..c4933e89dbb 100644
--- a/addons/note/security/note_security.xml
+++ b/addons/note/security/note_security.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <openerp>
-<data>
+<data noupdate="1">
 
     <record id="group_note_fancy" model="res.groups">
         <field name="name">Notes / Fancy mode</field>
diff --git a/addons/purchase_double_validation/purchase_double_validation_workflow.xml b/addons/purchase_double_validation/purchase_double_validation_workflow.xml
index 673063ff049..9c9cd7c9359 100644
--- a/addons/purchase_double_validation/purchase_double_validation_workflow.xml
+++ b/addons/purchase_double_validation/purchase_double_validation_workflow.xml
@@ -23,7 +23,6 @@
         <record id="trans_confirmed_double_gt" model="workflow.transition">
             <field name="act_from" ref="act_double_check"/>
             <field name="act_to" ref="act_double_wait"/>
-            <field name="condition">amount_untaxed &gt;= 5000</field>
             <field name="signal">purchase_approve</field>
             <field name="group_id" ref="purchase.group_purchase_manager"/>
         </record>
@@ -31,7 +30,6 @@
         <record id="trans_confirmed_double_lt" model="workflow.transition">
             <field name="act_from" ref="act_double_check"/>
             <field name="act_to" ref="act_double_wait"/>
-            <field name="condition">amount_untaxed &lt; 5000</field>
         </record>
 
         <record id="trans_double_app_conf" model="workflow.transition">
@@ -40,4 +38,12 @@
         </record>
 
     </data>
+    <data noupdate="1">
+        <record id="trans_confirmed_double_gt" model="workflow.transition">
+            <field name="condition">amount_untaxed &gt;= 5000</field>
+        </record>
+        <record id="trans_confirmed_double_lt" model="workflow.transition">
+            <field name="condition">amount_untaxed &lt; 5000</field>
+        </record>
+    </data>
 </openerp>
diff --git a/addons/report_webkit/webkit_report.py b/addons/report_webkit/webkit_report.py
index 53fe353f898..6024ec34c6d 100644
--- a/addons/report_webkit/webkit_report.py
+++ b/addons/report_webkit/webkit_report.py
@@ -43,6 +43,7 @@ from report_helper import WebKitHelper
 import openerp
 from openerp.modules.module import get_module_resource
 from openerp.report.report_sxw import *
+from openerp import SUPERUSER_ID
 from openerp import tools
 from openerp.tools.translate import _
 from openerp.osv.osv import except_osv
@@ -127,7 +128,7 @@ class WebKitParser(report_sxw):
     def get_lib(self, cursor, uid):
         """Return the lib wkhtml path"""
         proxy = self.pool['ir.config_parameter']
-        webkit_path = proxy.get_param(cursor, uid, 'webkit_path')
+        webkit_path = proxy.get_param(cursor, SUPERUSER_ID, 'webkit_path')
 
         if not webkit_path:
             try:
diff --git a/addons/stock/stock.py b/addons/stock/stock.py
index b3e9d951673..49ee9cf3c61 100644
--- a/addons/stock/stock.py
+++ b/addons/stock/stock.py
@@ -1126,7 +1126,9 @@ class stock_picking(osv.osv):
         invoices_group = {}
         res = {}
         inv_type = type
-        for picking in self.browse(cr, uid, ids, context=context):
+        for picking_id in ids:
+            # The browse inside the loop is done on purpose, as a change in the pickings during the loop is possible
+            picking = self.browse(cr, uid, picking_id, context=context)
             if picking.invoice_state != '2binvoiced':
                 continue
             partner = self._get_partner_to_invoice(cr, uid, picking, context=context)