diff --git a/calendar/inc/class.calendar_groupdav.inc.php b/calendar/inc/class.calendar_groupdav.inc.php
index 5883a74643..8d89eb15f3 100644
--- a/calendar/inc/class.calendar_groupdav.inc.php
+++ b/calendar/inc/class.calendar_groupdav.inc.php
@@ -98,8 +98,11 @@ class calendar_groupdav extends groupdav_handler
 	 */
 	function propfind($path,$options,&$files,$user,$id='')
 	{
-		if ($this->debug) error_log(__METHOD__."($path,".array2string($options).",,$user,$id)");
-		$starttime = microtime(true);
+		if ($this->debug)
+		{
+			error_log(__METHOD__."($path,".array2string($options).",,$user,$id)");
+			$starttime = microtime(true);
+		}
 
 		// ToDo: add parameter to only return id & etag
 		$cal_filters = array(
@@ -121,7 +124,11 @@ class calendar_groupdav extends groupdav_handler
 		{
 			return false;
 		}
-		if ($this->debug > 1) error_log(__METHOD__."($path,,,$user,$id) cal_filters=".array2string($cal_filters));
+		if ($this->debug > 1)
+		{
+			error_log(__METHOD__."($path,,,$user,$id) cal_filters=".
+				array2string($cal_filters));
+		}
 
 		// check if we have to return the full calendar data or just the etag's
 		if (!($calendar_data = $options['props'] == 'all' && $options['root']['ns'] == groupdav::CALDAV) && is_array($options['props']))
@@ -183,7 +190,11 @@ class calendar_groupdav extends groupdav_handler
 				);
 			}
 		}
-		if ($this->debug) error_log(__METHOD__."($path) took ".(microtime(true) - $starttime).' to return '.count($files['files']).' items');
+		if ($this->debug)
+		{
+			error_log(__METHOD__."($path) took ".(microtime(true) - $starttime).
+				' to return '.count($files['files']).' items');
+		}
 		return true;
 	}
 
@@ -284,11 +295,9 @@ class calendar_groupdav extends groupdav_handler
 			{
 				foreach($options['other'] as $option)
 				{
-
 					if ($option['name'] == 'href')
 					{
 						$parts = explode('/',$option['data']);
-
 						if (is_numeric($id = basename(array_pop($parts),'.ics'))) $ids[] = $id;
 					}
 				}
@@ -424,13 +433,13 @@ class calendar_groupdav extends groupdav_handler
 	 */
 	function put(&$options,$id,$user=null)
 	{
-		if($this->debug) error_log(__METHOD__."($id, $user)".print_r($options,true));
+		if ($this->debug) error_log(__METHOD__."($id, $user)".print_r($options,true));
 		$return_no_access=true;	// as handled by importVCal anyway and allows it to set the status for participants
 		$event = $this->_common_get_put_delete('PUT',$options,$id,$return_no_access);
 
 		if (!is_null($event) && !is_array($event))
 		{
-			if($this->debug) error_log(__METHOD__.print_r($event,true).function_backtrace());
+			if ($this->debug) error_log(__METHOD__.print_r($event,true).function_backtrace());
 			return $event;
 		}
 		$handler = $this->_get_handler();
diff --git a/calendar/inc/class.calendar_ical.inc.php b/calendar/inc/class.calendar_ical.inc.php
index 04834cc128..3c9f0b1948 100644
--- a/calendar/inc/class.calendar_ical.inc.php
+++ b/calendar/inc/class.calendar_ical.inc.php
@@ -196,6 +196,7 @@ class calendar_ical extends calendar_boupdate
 			'UID'			=> 'uid',
 			'RECURRENCE-ID' => 'recurrence',
 			'SEQUENCE'		=> 'etag',
+			'STATUS'		=> 'status',
 		);
 
 		if (!is_array($this->supportedFields)) $this->setSupportedFields();
@@ -218,7 +219,7 @@ class calendar_ical extends calendar_boupdate
 		{
 			$mailtoOrganizer = false;
 			$organizerCN = false;
-			$recurrence = $recur_date;
+			$recurrence = $this->date2usertime($recur_date);
 			$tzid = null;
 
 			if (!is_array($event)
@@ -622,6 +623,10 @@ class calendar_ical extends calendar_boupdate
 						}
 						break;
 
+					case 'STATUS':
+						$attributes['STATUS'] = 'CONFIRMED';
+						break;
+
 					case 'CATEGORIES':
 						if ($event['category'] && ($values['CATEGORIES'] = $this->get_categories($event['category'])))
 						{
@@ -641,12 +646,12 @@ class calendar_ical extends calendar_boupdate
 						{
 								$icalFieldName = 'X-RECURRENCE-ID';
 						}
-						if ($recurrence)
+						if ($recur_date)
 						{
 							// We handle a pseudo exception
 							if (isset($event['whole_day']))
 							{
-								$time = new egw_time($recurrence,egw_time::$server_timezone);
+								$time = new egw_time($recur_date,egw_time::$server_timezone);
 								$time->setTimezone(self::$tz_cache[$event['tzid']]);
 								$arr = egw_time::to($time,'array');
 								$vevent->setAttribute($icalFieldName, array(
@@ -658,7 +663,7 @@ class calendar_ical extends calendar_boupdate
 							}
 							else
 							{
-								$attributes[$icalFieldName] = self::getDateTime($recurrence,$tzid,$parameters[$icalFieldName]);
+								$attributes[$icalFieldName] = self::getDateTime($recur_date,$tzid,$parameters[$icalFieldName]);
 							}
 						}
 						elseif ($event['recurrence'] && $event['reference'])
@@ -734,7 +739,6 @@ class calendar_ical extends calendar_boupdate
 						{
 							$attributes[$icalFieldName] = $value;
 						}
-					break;
 				}
 			}
 
@@ -1089,8 +1093,8 @@ class calendar_ical extends calendar_boupdate
 
 						// If this is an updated meeting, and the client doesn't support
 						// participants OR the event no longer contains participants, add them back
-						$event['participants'] = $event_info['stored_event']['participants'];
-						$event['participant_types'] = $event_info['stored_event']['participant_types'];
+						unset($event['participants']);
+						unset($event['participant_types']);
 					}
 					else
 					{
@@ -1748,6 +1752,7 @@ class calendar_ical extends calendar_boupdate
 		$defaultFields['basic'] = $defaultFields['minimal'] + array(
 			'recur_exception'	=> 'recur_exception',
 			'priority'			=> 'priority',
+			'status'			=> 'status',
 		);
 
 		$defaultFields['nexthaus'] = $defaultFields['basic'] + array(
@@ -2662,14 +2667,6 @@ class calendar_ical extends calendar_boupdate
 
 	function search($_vcalData, $contentID=null, $relax=false)
 	{
-		if (is_null($contentID))
-		{
-			$eventId = -1;
-		}
-		else
-		{
-			$eventId = $contentID;
-		}
 		if (($events = $this->icaltoegw($_vcalData)))
 		{
 			// this function only supports searching a single event
diff --git a/calendar/inc/class.calendar_sif.inc.php b/calendar/inc/class.calendar_sif.inc.php
index 6551ebd2f9..f75ffd2a6e 100644
--- a/calendar/inc/class.calendar_sif.inc.php
+++ b/calendar/inc/class.calendar_sif.inc.php
@@ -312,10 +312,7 @@ class calendar_sif extends calendar_boupdate
 						if ($this->event['recur_noenddate'] == 0)
 						{
 							$recur_enddate = $this->vCalendar->_parseDateTime($this->event['recur_enddate']);
-							$finalEvent['recur_enddate'] = mktime(
-									date('H', 23),
-									date('i', 59),
-									date('s', 59),
+							$finalEvent['recur_enddate'] = mktime(0, 0, 0,
 									date('m', $recur_enddate),
 									date('d', $recur_enddate),
 									date('Y', $recur_enddate));
@@ -480,6 +477,11 @@ class calendar_sif extends calendar_boupdate
 				// overwrite with server data for merge
 				foreach ($event_info['stored_event'] as $key => $value)
 				{
+					if (in_array($key, array('participants', 'participant_types')))
+					{
+						unset($event[$key]);
+						continue;
+					}
 					if (!empty($value))	$event[$key] = $value;
 				}
 			}
@@ -487,8 +489,8 @@ class calendar_sif extends calendar_boupdate
 			{
 				// not merge
 				// SIF clients do not support participants => add them back
-				$event['participants'] = $event_info['stored_event']['participants'];
-				$event['participant_types'] = $event_info['stored_event']['participant_types'];
+				unset($event['participants']);
+				unset($event['participant_types']);
 				if ($event['whole_day'] && $event['tzid'] != $event_info['stored_event']['tzid'])
 				{
 					if (!isset(self::$tz_cache[$event_info['stored_event']['tzid']]))
diff --git a/calendar/inc/class.calendar_so.inc.php b/calendar/inc/class.calendar_so.inc.php
index f5cf124b7b..001aed31d3 100644
--- a/calendar/inc/class.calendar_so.inc.php
+++ b/calendar/inc/class.calendar_so.inc.php
@@ -1491,16 +1491,14 @@ ORDER BY cal_user_type, cal_usre_id
 	 * get stati of all recurrences of an event for a specific participant
 	 *
 	 * @param int $cal_id
-	 * @param int $uid participant uid
+	 * @param int $uid=null  participant uid; if == null return only the recur dates
 	 * @param int $start=0  if != 0: startdate of the search/list (servertime)
 	 * @param int $end=0  if != 0: enddate of the search/list (servertime)
 	 *
 	 * @return array recur_date => status pairs (index 0 => main status)
 	 */
-	function get_recurrences($cal_id, $uid, $start=0, $end=0)
+	function get_recurrences($cal_id, $uid=null, $start=0, $end=0)
 	{
-		$user_type = $user_id = null;
-		self::split_user($uid, $user_type, $user_id);
 		$participant_status = array();
 		$where = array('cal_id' => $cal_id);
 		if ($start != 0 && $end == 0) $where[] = '(cal_recur_date = 0 OR cal_recur_date >= ' . (int)$start . ')';
@@ -1515,6 +1513,9 @@ ORDER BY cal_user_type, cal_usre_id
 			// inititalize the array
 			$participant_status[$row['cal_recur_date']] = null;
 		}
+		if (is_null($uid)) return $participant_status;
+		$user_type = $user_id = null;
+		self::split_user($uid, $user_type, $user_id);
 		$where = array(
 			'cal_id'		=> $cal_id,
 			'cal_user_type'	=> $user_type ? $user_type : 'u',