diff --git a/airtime_mvc/application/controllers/AudiopreviewController.php b/airtime_mvc/application/controllers/AudiopreviewController.php
index 6e579045c..69b82939e 100644
--- a/airtime_mvc/application/controllers/AudiopreviewController.php
+++ b/airtime_mvc/application/controllers/AudiopreviewController.php
@@ -184,6 +184,7 @@ class AudiopreviewController extends Zend_Controller_Action
                 'element_artist' => isset($track['artist_name'])?$track['artist_name']:"",
                 'element_id' => isset($track['id'])?$track['id']:"",
                 'element_position' => isset($track['position'])?$track['position']:"",
+                'mime' => isset($track['mime'])?$track['mime']:""
             );
 
         /* If the track type is static we know it must be
diff --git a/airtime_mvc/application/models/Preference.php b/airtime_mvc/application/models/Preference.php
index e227ff403..71a356aa5 100644
--- a/airtime_mvc/application/models/Preference.php
+++ b/airtime_mvc/application/models/Preference.php
@@ -1095,7 +1095,8 @@ class Application_Model_Preference
     public static function getCurrentLibraryTableSetting()
     {
         $v = self::getValue("library_datatable");
-        if( $v === '' ) {
+
+        if ( $v === '' ) {
             return function ($x) { return $x; };
         } else {
             $ds = unserialize($v);
diff --git a/airtime_mvc/application/models/Schedule.php b/airtime_mvc/application/models/Schedule.php
index 6e61dba97..de81f04f7 100644
--- a/airtime_mvc/application/models/Schedule.php
+++ b/airtime_mvc/application/models/Schedule.php
@@ -782,7 +782,10 @@ SQL;
                 $media_id = $item['stream_id'];
                 $uri = $item['url'];
                 self::createStreamScheduleEvent($data, $item, $media_id, $uri);
+            } else {
+                throw new Exception("Unknown schedule type: ".print_r($item, true));
             }
+             
         }
     }
 
diff --git a/airtime_mvc/public/js/airtime/audiopreview/preview_jplayer.js b/airtime_mvc/public/js/airtime/audiopreview/preview_jplayer.js
index b1c90dbf3..a1d604f41 100644
--- a/airtime_mvc/public/js/airtime/audiopreview/preview_jplayer.js
+++ b/airtime_mvc/public/js/airtime/audiopreview/preview_jplayer.js
@@ -143,7 +143,7 @@ function buildplaylist(p_url, p_playIndex) {
                         mp3:data[index]['uri']
                 };
             }
-            if (media) {
+            if (media && isAudioSupported(data[index]['mime'])) {
                 myPlaylist[index] = media;
             }
             // we should create a map according to the new position in the
diff --git a/airtime_mvc/public/js/airtime/common/audioplaytest.js b/airtime_mvc/public/js/airtime/common/audioplaytest.js
index aa9b8917b..76bc5d7c1 100644
--- a/airtime_mvc/public/js/airtime/common/audioplaytest.js
+++ b/airtime_mvc/public/js/airtime/common/audioplaytest.js
@@ -9,5 +9,10 @@ function isAudioSupported(mime){
         bMime = mime;
     }
 
-    return !!bMime && !!audio.canPlayType && audio.canPlayType(bMime) != "";
+    //return a true of the browser can play this file natively, or if the
+    //file is an mp3 and flash is installed (jPlayer will fall back to flash to play mp3s).
+    //Note that checking the navigator.mimeTypes value does not work for IE7, but the alternative
+    //is adding a javascript library to do the work for you, which seems like overkill....
+    return (!!audio.canPlayType && audio.canPlayType(bMime) != "") || 
+        (mime.indexOf("mp3") != -1 && navigator.mimeTypes ["application/x-shockwave-flash"] != undefined);
 }