diff --git a/src/zm_monitorstream.cpp b/src/zm_monitorstream.cpp
index 4ce0eebeb..d4d387219 100644
--- a/src/zm_monitorstream.cpp
+++ b/src/zm_monitorstream.cpp
@@ -460,18 +460,19 @@ bool MonitorStream::sendFrame(Image *image, SystemTimePoint timestamp) {
 
   }  // Not mpeg
 
-  TimePoint send_end_time = std::chrono::steady_clock::now();
-  TimePoint::duration frame_send_time = send_end_time - send_start_time;
-  TimePoint::duration maxfps_milliseconds = Milliseconds(lround(Milliseconds::period::den / maxfps));
+  last_frame_sent = std::chrono::steady_clock::now();
+  if (maxfps) {
+    TimePoint::duration frame_send_time = last_frame_sent - send_start_time;
+    TimePoint::duration maxfps_milliseconds = Milliseconds(lround(Milliseconds::period::den / maxfps));
 
-  if (frame_send_time > maxfps_milliseconds) {
-    //maxfps /= 1.5;
-    Warning("Frame send time %" PRIi64 " msec too slow (> %" PRIi64 ", throttling maxfps to %.3f",
-        static_cast<int64>(std::chrono::duration_cast<Milliseconds>(frame_send_time).count()),
-        static_cast<int64>(std::chrono::duration_cast<Milliseconds>(maxfps_milliseconds).count()),
-        maxfps);
+    if (frame_send_time > maxfps_milliseconds) {
+      //maxfps /= 1.5;
+      Warning("Frame send time %" PRIi64 " msec too slow (> %" PRIi64 ", throttling maxfps to %.3f",
+          static_cast<int64>(std::chrono::duration_cast<Milliseconds>(frame_send_time).count()),
+          static_cast<int64>(std::chrono::duration_cast<Milliseconds>(maxfps_milliseconds).count()),
+          maxfps);
+    }
   }
-  last_frame_sent = send_end_time;
   return true;
 }  // end bool MonitorStream::sendFrame(Image *image, SystemTimePoint timestamp)
 
diff --git a/web/ajax/stream.php b/web/ajax/stream.php
index 2557977ca..ade101845 100644
--- a/web/ajax/stream.php
+++ b/web/ajax/stream.php
@@ -1,5 +1,5 @@
 <?php
-  error_reporting(0);
+error_reporting(0);
 
 $start_time = time();
 
@@ -7,7 +7,7 @@ define('MSG_TIMEOUT', ZM_WEB_AJAX_TIMEOUT/2);
 define('MSG_DATA_SIZE', 4+256);
 
 if ( !($_REQUEST['connkey'] && $_REQUEST['command']) ) {
-  ajaxError("Unexpected received message type '$type'");
+  ajaxError('No connkey or no command in stream ajax');
 }
 
 mkdir(ZM_PATH_SOCKS);
@@ -15,7 +15,17 @@ mkdir(ZM_PATH_SOCKS);
 # The file that we point ftok to has to exist, and only exist if zms is running, so we are pointing it at the .sock
 $key = ftok(ZM_PATH_SOCKS.'/zms-'.sprintf('%06d',$_REQUEST['connkey']).'s.sock', 'Z');
 $semaphore = sem_get($key,1);
-if ( sem_acquire($semaphore,1) !== false ) {
+$semaphore_tries = 10;
+$have_semaphore = false;
+
+while ( $semaphore_tries ) {
+  $have_semaphore = sem_acquire($semaphore,1);
+  if ($have_semaphore !== false) break;
+  ZM\Debug("Failed to get semaphore, trying again");
+  usleep(100000);
+  $semaphore_tries -= 1;
+}
+if ($have_semaphore) {
   if ( !($socket = @socket_create(AF_UNIX, SOCK_DGRAM, 0)) ) {
     ajaxError('socket_create() failed: '.socket_strerror(socket_last_error()));
   }
@@ -161,12 +171,11 @@ if ( sem_acquire($semaphore,1) !== false ) {
     ajaxResponse(array('status'=>$data));
     break;
   default :
-    ajaxError("Unexpected received message type '$type'");
+    ajaxError('Unexpected received message type '.$data['type']);
   }
   sem_release($semaphore);
 } else {
-  ZM\Debug('Couldn\'t get semaphore');
-  ajaxResponse(array());
+  ajaxError("Unable to get semaphore.");
 }
 
 ajaxError('Unrecognised action or insufficient permissions in ajax/stream');
diff --git a/web/skins/classic/views/js/watch.js.php b/web/skins/classic/views/js/watch.js.php
index 04a6c0757..be8065d12 100644
--- a/web/skins/classic/views/js/watch.js.php
+++ b/web/skins/classic/views/js/watch.js.php
@@ -60,16 +60,16 @@ var mode = "<?php echo $options['mode'] ?>";
 
 var monitorData = new Array();
 <?php
-foreach ($monitors as $monitor) {
+foreach ($monitors as $m) {
 ?>
 monitorData[monitorData.length] = {
-  'id': <?php echo $monitor->Id() ?>,
-  'width': <?php echo $monitor->ViewWidth() ?>,
-  'height':<?php echo $monitor->ViewHeight() ?>,
-  'url': '<?php echo $monitor->UrlToIndex() ?>',
-  'onclick': function(){window.location.assign( '?view=watch&mid=<?php echo $monitor->Id() ?>' );},
-  'type': '<?php echo $monitor->Type() ?>',
-  'refresh': '<?php echo $monitor->Refresh() ?>'
+  'id': <?php echo $m->Id() ?>,
+  'width': <?php echo $m->ViewWidth() ?>,
+  'height':<?php echo $m->ViewHeight() ?>,
+  'url': '<?php echo $m->UrlToIndex() ?>',
+  'onclick': function(){window.location.assign( '?view=watch&mid=<?php echo $m->Id() ?>' );},
+  'type': '<?php echo $m->Type() ?>',
+  'refresh': '<?php echo $m->Refresh() ?>'
 };
 <?php
 } // end foreach monitor
@@ -101,9 +101,10 @@ var appletRefreshTime = <?php echo ZM_RELOAD_CAMBOZOLA ?>;
 var labels = new Array();
 <?php
 $labels = array();
+ZM\Debug("Presets");
 foreach (dbFetchAll('SELECT * FROM ControlPresets WHERE MonitorId = ?', NULL, array($monitor->Id())) as $row) {
   $label = $labels[$row['Preset']] = $row['Label'];
-  echo 'labels['. validInt($index) .'] = \''.validJsStr($label).'\'';
+  echo 'labels['. validInt($row['Preset']) .'] = \''.validJsStr($label).'\';'.PHP_EOL;
 }
 ?>
 var deleteString = "<?php echo translate('Delete') ?>";