diff --git a/calendar/inc/class.bocalendar.inc.php b/calendar/inc/class.bocalendar.inc.php
index d7fdc97f69..3f954cf315 100755
--- a/calendar/inc/class.bocalendar.inc.php
+++ b/calendar/inc/class.bocalendar.inc.php
@@ -521,7 +521,7 @@
 				}
 
 				$event = $this->get_cached_event();
-				if(!@$event['participants'][$l_cal['owner']])
+				if(!@isset($event['participants'][$l_cal['owner']]))
 				{
 					$this->so->add_attribute('owner',$minparts);
 				}
@@ -623,7 +623,7 @@
 		
 			if(($event['owner'] == $this->owner) && ($this->check_perms(PHPGW_ACL_EDIT) == True))
 			{
-				if($event['public'] != True)
+				if($event['public'] == False || $event['public'] == 0)
 				{
 					if($this->check_perms(PHPGW_ACL_PRIVATE) == True)
 					{
diff --git a/calendar/inc/class.uicalendar.inc.php b/calendar/inc/class.uicalendar.inc.php
index e6aa4ea195..97d42186b9 100755
--- a/calendar/inc/class.uicalendar.inc.php
+++ b/calendar/inc/class.uicalendar.inc.php
@@ -612,7 +612,7 @@
 				
 				if(!$this->bo->can_user_edit($event))
 				{
-					Header('Location: '.$this->page('view','&cal_id='$cal_id));
+					Header('Location: '.$this->page('view','&cal_id='.$cal_id));
 					$GLOBALS['phpgw']->common->phpgw_exit();
 				}
 				if(@isset($GLOBALS['HTTP_POST_VARS']['edit_type']) && $GLOBALS['HTTP_POST_VARS']['edit_type'] == 'single')