diff --git a/addons/mail/mail_mail.py b/addons/mail/mail_mail.py
index 9dcea079338..084b8d796fb 100644
--- a/addons/mail/mail_mail.py
+++ b/addons/mail/mail_mail.py
@@ -150,7 +150,7 @@ class mail_mail(osv.Model):
             - partner is an user and has read access to the document: direct link to document with model, res_id
         """
         if partner and partner.user_ids:
-            base_url = self.pool.get('ir.config_parameter').get_param(cr, uid, 'web.base.url')
+            base_url = self.pool.get('ir.config_parameter').get_param(cr, SUPERUSER_ID, 'web.base.url')
             # the parameters to encode for the query and fragment part of url
             query = {'db': cr.dbname}
             fragment = {
diff --git a/addons/web_gantt/static/src/js/gantt.js b/addons/web_gantt/static/src/js/gantt.js
index 74a1aa9e0ed..a0cc583bf9b 100644
--- a/addons/web_gantt/static/src/js/gantt.js
+++ b/addons/web_gantt/static/src/js/gantt.js
@@ -162,7 +162,7 @@ instance.web_gantt.GanttView = instance.web.View.extend({
                         self.fields[self.fields_view.arch.attrs.date_delay]);
                     if (!tmp)
                         return;
-                    task_stop = task_start.clone().addMilliseconds(tmp * 60 * 60 * 1000);
+                    task_stop = task_start.clone().addMilliseconds(instance.web.parse_value(tmp, {type:"float"}) * 60 * 60 * 1000);
                 }
                 var duration = (task_stop.getTime() - task_start.getTime()) / (1000 * 60 * 60);
                 var id = _.uniqueId("gantt_task_");