diff --git a/addons/account/wizard/wizard_tax_adjustments.py b/addons/account/wizard/wizard_tax_adjustments.py
index 2f188b1abab..51f1936b93b 100644
--- a/addons/account/wizard/wizard_tax_adjustments.py
+++ b/addons/account/wizard/wizard_tax_adjustments.py
@@ -18,7 +18,7 @@ class TaxAdjustments(models.TransientModel):
     debit_account_id = fields.Many2one('account.account', string='Debit account', required=True, domain=[('deprecated', '=', False)])
     credit_account_id = fields.Many2one('account.account', string='Credit account', required=True, domain=[('deprecated', '=', False)])
     amount = fields.Monetary(currency_field='company_currency_id', required=True)
-    adjustment_type = fields.Selection([('debit', 'Adjustment in favor of the Estate'), ('credit', 'Adjustment in your favor')], string="Adjustment Type", store=False, required=True)
+    adjustment_type = fields.Selection([('debit', 'Applied on debit journal item'), ('credit', 'Applied on credit journal item')], string="Adjustment Type", store=False, required=True)
     company_currency_id = fields.Many2one('res.currency', readonly=True, default=lambda self: self.env.user.company_id.currency_id)
     tax_id = fields.Many2one('account.tax', string='Adjustment Tax', ondelete='restrict', domain=[('type_tax_use', '=', 'adjustment')], required=True)
 
diff --git a/addons/account_payment/models/payment.py b/addons/account_payment/models/payment.py
index 389cfa206e1..cfc90258289 100644
--- a/addons/account_payment/models/payment.py
+++ b/addons/account_payment/models/payment.py
@@ -159,7 +159,7 @@ class PaymentTransaction(models.Model):
                 'currency_id': invoice.currency_id.id,
                 'partner_id': invoice.partner_id.id,
                 'partner_country_id': invoice.partner_id.country_id.id,
-                'reference': self.get_next_reference(invoice.number),
+                'reference': self._get_next_reference(invoice.number, acquirer=acquirer),
                 'account_invoice_id': invoice.id,
             }
             if add_tx_values:
diff --git a/addons/delivery/models/sale_order.py b/addons/delivery/models/sale_order.py
index f6dd0fbb9d8..b2ffaf67231 100644
--- a/addons/delivery/models/sale_order.py
+++ b/addons/delivery/models/sale_order.py
@@ -96,9 +96,10 @@ class SaleOrder(models.Model):
             taxes_ids = self.fiscal_position_id.map_tax(taxes, carrier.product_id, self.partner_id).ids
 
         # Create the sales order line
+        carrier_name = carrier.product_id.with_context(lang=self.partner_id.lang).name_get()[0][1]
         values = {
             'order_id': self.id,
-            'name': carrier.name,
+            'name': carrier_name,
             'product_uom_qty': 1,
             'product_uom': carrier.product_id.uom_id.id,
             'product_id': carrier.product_id.id,
diff --git a/addons/event/security/ir.model.access.csv b/addons/event/security/ir.model.access.csv
index 49d859ad183..ed7ec0e0cc6 100644
--- a/addons/event/security/ir.model.access.csv
+++ b/addons/event/security/ir.model.access.csv
@@ -5,7 +5,7 @@ access_event_event_portal,event.event.portal,model_event_event,,1,0,0,0
 access_event_event_user,event.event.user,model_event_event,event.group_event_user,1,0,0,0
 access_event_event_manager,event.event.manager,model_event_event,event.group_event_manager,1,1,1,1
 access_event_registration,event.registration,model_event_registration,event.group_event_user,1,1,1,1
-access_event_registration_portal,event.registration,model_event_registration,,1,0,0,0
+access_event_registration_portal,event.registration,model_event_registration,,0,0,0,0
 access_event_mail,event.mail,model_event_mail,event.group_event_user,1,0,0,0
 access_event_mail_manager,event.mail manager,model_event_mail,event.group_event_manager,1,1,1,1
 access_event_mail_registration,event.mail.registration,model_event_mail_registration,event.group_event_user,1,0,0,0
diff --git a/addons/event_sale/models/sale_order.py b/addons/event_sale/models/sale_order.py
index 7a2dcd8a745..6902d8e4743 100644
--- a/addons/event_sale/models/sale_order.py
+++ b/addons/event_sale/models/sale_order.py
@@ -41,7 +41,7 @@ class SaleOrderLine(models.Model):
         order line has a product_uom_qty attribute that will be the number of
         registrations linked to this line. This method update existing registrations
         and create new one for missing one. """
-        Registration = self.env['event.registration']
+        Registration = self.env['event.registration'].sudo()
         registrations = Registration.search([('sale_order_line_id', 'in', self.ids), ('state', '!=', 'cancel')])
         for so_line in self.filtered('event_id'):
             existing_registrations = registrations.filtered(lambda self: self.sale_order_line_id.id == so_line.id)
diff --git a/addons/hr_holidays/models/hr_leave.py b/addons/hr_holidays/models/hr_leave.py
index 9ea99dae38f..2ab11a91a82 100644
--- a/addons/hr_holidays/models/hr_leave.py
+++ b/addons/hr_holidays/models/hr_leave.py
@@ -85,11 +85,6 @@ class HolidaysRequest(models.Model):
         ('date_check', "CHECK ( number_of_days_temp >= 0 )", "The number of days must be greater than 0."),
     ]
 
-    @api.onchange('employee_id')
-    def _onchange_employee_id(self):
-        self.manager_id = self.employee_id and self.employee_id.parent_id
-        self.department_id = self.employee_id.department_id
-
     @api.multi
     @api.depends('number_of_days_temp')
     def _compute_number_of_days(self):
@@ -121,7 +116,8 @@ class HolidaysRequest(models.Model):
             self.department_id = None
 
     @api.onchange('employee_id')
-    def _onchange_employee(self):
+    def _onchange_employee_id(self):
+        self.manager_id = self.employee_id and self.employee_id.parent_id
         if self.holiday_type == 'employee':
             self.department_id = self.employee_id.department_id
 
diff --git a/addons/payment/models/payment_acquirer.py b/addons/payment/models/payment_acquirer.py
index 2d07a174a7e..abaf9ba0368 100644
--- a/addons/payment/models/payment_acquirer.py
+++ b/addons/payment/models/payment_acquirer.py
@@ -687,6 +687,10 @@ class PaymentTransaction(models.Model):
 
     @api.model
     def get_next_reference(self, reference):
+        return self._get_next_reference(reference)
+
+    @api.model
+    def _get_next_reference(self, reference, acquirer=None):
         ref_suffix = 1
         init_ref = reference
         while self.env['payment.transaction'].sudo().search_count([('reference', '=', reference)]):
diff --git a/addons/payment_sips/models/payment.py b/addons/payment_sips/models/payment.py
index bbbe64b3feb..874d88508e4 100644
--- a/addons/payment_sips/models/payment.py
+++ b/addons/payment_sips/models/payment.py
@@ -4,6 +4,7 @@
 
 import json
 import logging
+import re
 from hashlib import sha256
 
 from werkzeug import urls
@@ -111,6 +112,16 @@ class AcquirerSips(models.Model):
         return self.environment == 'prod' and self.sips_prod_url or self.sips_test_url
 
 
+class PaymentTransactionSips(models.Model):
+    _inherit = 'payment.transaction'
+
+    @api.model
+    def _get_next_reference(self, reference, acquirer=None):
+        if acquirer and acquirer.provider == 'sips':
+            reference = re.sub(r'[^0-9a-zA-Z]+', 'x' , reference)
+        return super(PaymentTransactionSips, self)._get_next_reference(reference, acquirer=acquirer)
+
+
 class TxSips(models.Model):
     _inherit = 'payment.transaction'
 
diff --git a/addons/point_of_sale/models/product.py b/addons/point_of_sale/models/product.py
index e1a85cd7c4a..1caded3870e 100644
--- a/addons/point_of_sale/models/product.py
+++ b/addons/point_of_sale/models/product.py
@@ -21,6 +21,11 @@ class ProductTemplate(models.Model):
                 raise UserError(_('You cannot delete a product saleable in point of sale while a session is still opened.'))
         return super(ProductTemplate, self).unlink()
 
+    @api.onchange('sale_ok')
+    def _onchange_sale_ok(self):
+        if not self.sale_ok:
+            self.available_in_pos = False
+
 
 class ProductUomCateg(models.Model):
     _inherit = 'product.uom.categ'
diff --git a/addons/project/i18n/project.pot b/addons/project/i18n/project.pot
index 5ed93bba242..ae8e38c46ce 100644
--- a/addons/project/i18n/project.pot
+++ b/addons/project/i18n/project.pot
@@ -1020,6 +1020,12 @@ msgstr ""
 msgid "Ending Date"
 msgstr ""
 
+#. module: project
+#: code:addons/project/models/project.py:556
+#, python-format
+msgid "Error! You cannot create recursive hierarchy of task(s)."
+msgstr ""
+
 #. module: project
 #: sql_constraint:project.project:0
 msgid "Error! project start-date must be lower than project end-date."
diff --git a/addons/project/models/project.py b/addons/project/models/project.py
index 4ca2198b1fc..e02dcf8fac5 100644
--- a/addons/project/models/project.py
+++ b/addons/project/models/project.py
@@ -641,6 +641,12 @@ class Task(models.Model):
             default['remaining_hours'] = self.planned_hours
         return super(Task, self).copy(default)
 
+    @api.constrains('parent_id')
+    def _check_parent_id(self):
+        for task in self:
+            if not task._check_recursion():
+                raise ValidationError(_('Error! You cannot create recursive hierarchy of task(s).'))
+
     # Override view according to the company definition
     @api.model
     def fields_view_get(self, view_id=None, view_type='form', toolbar=False, submenu=False):
@@ -1002,6 +1008,20 @@ class Task(models.Model):
             'type': 'ir.actions.act_window'
         }
 
+    def action_subtask(self):
+        action = self.env.ref('project.project_task_action_sub_task').read()[0]
+        ctx = self.env.context.copy()
+        ctx.update({
+            'default_parent_id': self.id,
+            'default_project_id': self.env.context.get('project_id', self.project_id.id),
+            'default_name': self.env.context.get('name', self.name) + ':',
+            'default_partner_id': self.env.context.get('partner_id', self.partner_id.id),
+            'search_default_project_id': self.env.context.get('project_id', self.project_id.id),
+        })
+        action['context'] = ctx
+        action['domain'] = [('id', 'child_of', self.id), ('id', '!=', self.id)]
+        return action
+
     # ---------------------------------------------------
     # Rating business
     # ---------------------------------------------------
diff --git a/addons/project/views/project_views.xml b/addons/project/views/project_views.xml
index dd3d3e18201..41dad0fef65 100644
--- a/addons/project/views/project_views.xml
+++ b/addons/project/views/project_views.xml
@@ -84,14 +84,6 @@
             <field name="name">Sub-tasks</field>
             <field name="res_model">project.task</field>
             <field name="view_mode">kanban,tree,form,calendar,pivot,graph</field>
-            <field name="domain">[('id', 'child_of', active_id), ('id', '!=', active_id)]</field>
-            <field name="context">
-            {
-                'default_parent_id' : active_id,
-                'default_project_id' : project_id,
-                'default_name' : name + ':',
-            }
-            </field>
             <field name="search_view_id" ref="project.view_task_search_form"/>
         </record>
 
@@ -424,7 +416,7 @@
                     <sheet string="Task">
                     <div class="oe_button_box" name="button_box">
                         <button class="oe_stat_button" icon="fa-tasks" type="object" name="action_open_parent_task" string="Parent Task" attrs="{'invisible' : [('parent_id', '=', False)]}" groups="project.group_subtask_project"/>
-                        <button id="subtask_stat_button" name="%(project_task_action_sub_task)d" type="action" class="oe_stat_button" icon="fa-tasks"
+                        <button name="action_subtask" type="object" class="oe_stat_button" icon="fa-tasks"
                             attrs="{'invisible' : [('parent_id', '!=', False)]}"
                             context="{'project_id': project_id, 'name': name, 'parent_id': id}" groups="project.group_subtask_project">
                             <field string="Sub-tasks" name="subtask_count" widget="statinfo"/>
diff --git a/addons/purchase/models/account_invoice.py b/addons/purchase/models/account_invoice.py
index 7f170d4e814..60659c5a7a2 100644
--- a/addons/purchase/models/account_invoice.py
+++ b/addons/purchase/models/account_invoice.py
@@ -167,7 +167,10 @@ class AccountInvoice(models.Model):
                         #for average/fifo/lifo costing method, fetch real cost price from incomming moves
                         valuation_price_unit = i_line.purchase_line_id.product_uom._compute_price(i_line.purchase_line_id.price_unit, i_line.uom_id)
                         stock_move_obj = self.env['stock.move']
-                        valuation_stock_move = stock_move_obj.search([('purchase_line_id', '=', i_line.purchase_line_id.id), ('state', '=', 'done')])
+                        valuation_stock_move = stock_move_obj.search([
+                            ('purchase_line_id', '=', i_line.purchase_line_id.id),
+                            ('state', '=', 'done'), ('product_qty', '!=', 0.0)
+                        ])
                         if self.type == 'in_refund':
                             valuation_stock_move = valuation_stock_move.filtered(lambda m: m._is_out())
                         elif self.type == 'in_invoice':
diff --git a/addons/sale_payment/models/payment.py b/addons/sale_payment/models/payment.py
index 831af37550f..f710b63630f 100644
--- a/addons/sale_payment/models/payment.py
+++ b/addons/sale_payment/models/payment.py
@@ -182,7 +182,7 @@ class PaymentTransaction(models.Model):
                 'currency_id': order.pricelist_id.currency_id.id,
                 'partner_id': order.partner_id.id,
                 'partner_country_id': order.partner_id.country_id.id,
-                'reference': self.get_next_reference(order.name),
+                'reference': self._get_next_reference(order.name, acquirer=acquirer),
                 'sale_order_id': order.id,
             }
             if add_tx_values:
diff --git a/addons/web/controllers/main.py b/addons/web/controllers/main.py
index 2f5f2171a27..77d7304df12 100644
--- a/addons/web/controllers/main.py
+++ b/addons/web/controllers/main.py
@@ -1116,7 +1116,7 @@ class Binary(http.Controller):
             if request.httprequest.user_agent.browser == 'safari':
                 # Safari sends NFD UTF-8 (where é is composed by 'e' and [accent])
                 # we need to send it the same stuff, otherwise it'll fail
-                filename = unicodedata.normalize('NFD', ufile.filename).encode('UTF-8')
+                filename = unicodedata.normalize('NFD', ufile.filename)
 
             try:
                 attachment = Model.create({
diff --git a/addons/website_event_sale/controllers/main.py b/addons/website_event_sale/controllers/main.py
index 7ccb7f9e4b5..d9af6bd312e 100644
--- a/addons/website_event_sale/controllers/main.py
+++ b/addons/website_event_sale/controllers/main.py
@@ -39,7 +39,7 @@ class WebsiteEventSaleController(WebsiteEventController):
         # free tickets -> order with amount = 0: auto-confirm, no checkout
         if not order.amount_total:
             order.action_confirm()  # tde notsure: email sending ?
-            attendees = request.env['event.registration'].browse(list(attendee_ids))
+            attendees = request.env['event.registration'].browse(list(attendee_ids)).sudo()
             # clean context and session, then redirect to the confirmation page
             request.website.sale_reset()
             return request.render("website_event.registration_complete", {
diff --git a/addons/website_slides/static/lib/pdfslidesviewer/PDFSlidesViewer.js b/addons/website_slides/static/lib/pdfslidesviewer/PDFSlidesViewer.js
index d5e7266930c..f313a37dfa3 100644
--- a/addons/website_slides/static/lib/pdfslidesviewer/PDFSlidesViewer.js
+++ b/addons/website_slides/static/lib/pdfslidesviewer/PDFSlidesViewer.js
@@ -147,12 +147,22 @@ var PDFSlidesViewer = (function(){
 
     PDFSlidesViewer.prototype.toggleFullScreenFooter = function(){
         if(document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement) {
-            $('div#PDFViewer > div.navbar-fixed-bottom').toggleClass('oe_show_footer');
+            var $navBarFooter = $('div#PDFViewer > div.navbar-fixed-bottom');
+            $navBarFooter.toggleClass('oe_show_footer');
+
+            if ($navBarFooter.css('display') === 'none') {
+                $navBarFooter.css('display', 'block');
+                $('div#PDFViewer').css('padding-bottom', '50px');
+            } else {
+                $navBarFooter.css('display', 'none');
+                $('div#PDFViewer').css('padding-bottom', '0');
+            }
         }
     }
 
     PDFSlidesViewer.prototype.toggleFullScreen = function(){
-        var el = this.canvas.parentNode;
+        // The canvas and the navigation bar needs to be fullscreened
+        var el = this.canvas.parentNode.parentNode;
 
         var isFullscreenAvailable = document.fullscreenEnabled || document.mozFullScreenEnabled || document.webkitFullscreenEnabled || document.msFullscreenEnabled || false;
         if(isFullscreenAvailable){ // Full screen supported