diff --git a/addons/account/models/account_invoice.py b/addons/account/models/account_invoice.py
index aebc0201e65..6ad1d83021c 100644
--- a/addons/account/models/account_invoice.py
+++ b/addons/account/models/account_invoice.py
@@ -1322,9 +1322,6 @@ class AccountInvoiceLine(models.Model):
                 self.price_unit = 0.0
             domain['uom_id'] = []
         else:
-            # Use the purchase uom by default
-            self.uom_id = self.product_id.uom_po_id
-
             if part.lang:
                 product = self.product_id.with_context(lang=part.lang)
             else:
diff --git a/addons/purchase/models/account_invoice.py b/addons/purchase/models/account_invoice.py
index e068a788e6a..ec35351ddd0 100644
--- a/addons/purchase/models/account_invoice.py
+++ b/addons/purchase/models/account_invoice.py
@@ -59,6 +59,13 @@ class AccountInvoice(models.Model):
             data['account_id'] = account.id
         return data
 
+    def _onchange_product_id(self):
+        domain = super(AccountInvoice, self)._onchange_product_id()
+        if self.purchase_id:
+            # Use the purchase uom by default
+            self.uom_id = self.product_id.uom_po_id
+        return domain
+
     # Load all unsold PO lines
     @api.onchange('purchase_id')
     def purchase_order_change(self):
diff --git a/odoo/addons/base/ir/ir_qweb/assetsbundle.py b/odoo/addons/base/ir/ir_qweb/assetsbundle.py
index 5034c1d84cf..28708f19ecb 100644
--- a/odoo/addons/base/ir/ir_qweb/assetsbundle.py
+++ b/odoo/addons/base/ir/ir_qweb/assetsbundle.py
@@ -199,12 +199,15 @@ class AssetsBundle(object):
         return self.env['ir.attachment'].sudo().browse(attachment_ids)
 
     def save_attachment(self, type, content, inc=None):
+        assert type in ('js', 'css')
         ira = self.env['ir.attachment']
 
         fname = '%s%s.%s' % (self.name, ('' if inc is None else '.%s' % inc), type)
+        mimetype = 'application/javascript' if type == 'js' else 'text/css'
         values = {
             'name': "/web/content/%s" % type,
             'datas_fname': fname,
+            'mimetype' : mimetype,
             'res_model': 'ir.ui.view',
             'res_id': False,
             'type': 'binary',