Index: audio.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/audio/audio.module,v
retrieving revision 1.51
diff -Ffunction -u -r1.51 audio.module
--- audio.module	21 Apr 2006 21:46:10 -0000	1.51
+++ audio.module	6 May 2006 22:11:15 -0000
@@ -1420,6 +1420,10 @@ function audio_write_id3tags($filepath, 
   foreach ((array) $pics as $pic) {
     $tagwriter->tag_data['APIC'][] = $pic;
   }
+  // add the required 'comment' tag if needed
+  if (!$audio['comment']) {
+    $tagwriter->tag_data['comment'] = array();
+  }
 
   // write tags
   $tagwriter->WriteTags();