diff --git a/apps/tasks/ajax/addtask.php b/apps/tasks/ajax/addtask.php
index 0c8cb89e7f..3f129a0eb9 100644
--- a/apps/tasks/ajax/addtask.php
+++ b/apps/tasks/ajax/addtask.php
@@ -5,8 +5,6 @@ require_once('../../../lib/base.php');
 OC_JSON::checkLoggedIn();
 OC_JSON::checkAppEnabled('tasks');
 
-$l10n = new OC_L10N('tasks');
-
 $cid = $_POST['id'];
 $calendar = OC_Calendar_App::getCalendar( $cid );
 
diff --git a/apps/tasks/ajax/addtaskform.php b/apps/tasks/ajax/addtaskform.php
index f56549cd74..48e1bc8d89 100644
--- a/apps/tasks/ajax/addtaskform.php
+++ b/apps/tasks/ajax/addtaskform.php
@@ -5,10 +5,8 @@ require_once('../../../lib/base.php');
 OC_JSON::checkLoggedIn();
 OC_JSON::checkAppEnabled('tasks');
 
-$l10n = new OC_L10N('tasks');
-
 $calendars = OC_Calendar_Calendar::allCalendars(OC_User::getUser(), true);
-$category_options = OC_Calendar_App::getCategoryOptions($l10n);
+$category_options = OC_Calendar_App::getCategoryOptions();
 $percent_options = range(0, 100, 10);
 $priority_options = OC_Task_App::getPriorityOptions();
 $tmpl = new OC_Template('tasks','part.addtaskform');
diff --git a/apps/tasks/ajax/delete.php b/apps/tasks/ajax/delete.php
index 03c8a7e92e..ce80191a56 100644
--- a/apps/tasks/ajax/delete.php
+++ b/apps/tasks/ajax/delete.php
@@ -25,20 +25,8 @@ require_once('../../../lib/base.php');
 OC_JSON::checkLoggedIn();
 OC_JSON::checkAppEnabled('tasks');
 
-$l10n = new OC_L10N('tasks');
-
 $id = $_GET['id'];
-$task = OC_Calendar_Object::find( $id );
-if( $task === false ){
-	OC_JSON::error(array('data' => array( 'message' => $l10n->t('Can not find Task!'))));
-	exit();
-}
-
-$calendar = OC_Calendar_Calendar::findCalendar( $task['calendarid'] );
-if( $calendar === false || $calendar['userid'] != OC_USER::getUser()){
-	OC_JSON::error(array('data' => array( 'message' => $l10n->t('This is not your task!'))));
-	exit();
-}
+$task = OC_Calendar_App::getEventObject( $id );
 
 OC_Calendar_Object::delete($id);
 OC_JSON::success(array('data' => array( 'id' => $id )));
diff --git a/apps/tasks/ajax/edittaskform.php b/apps/tasks/ajax/edittaskform.php
index e23eb21824..42a4bfead8 100644
--- a/apps/tasks/ajax/edittaskform.php
+++ b/apps/tasks/ajax/edittaskform.php
@@ -5,13 +5,11 @@ require_once('../../../lib/base.php');
 OC_JSON::checkLoggedIn();
 OC_JSON::checkAppEnabled('tasks');
 
-$l10n = new OC_L10N('tasks');
-
 $id = $_GET['id'];
 $details = OC_Calendar_App::getVCalendar($id)->VTODO;
 $categories = $details->getAsString('CATEGORIES');
 
-$category_options = OC_Calendar_App::getCategoryOptions($l10n);
+$category_options = OC_Calendar_App::getCategoryOptions();
 $percent_options = range(0, 100, 10);
 $priority_options = OC_Task_App::getPriorityOptions();