diff --git a/core/events.js b/core/events.js
index bc4299e55..9b9974478 100644
--- a/core/events.js
+++ b/core/events.js
@@ -393,7 +393,7 @@ Blockly.Events.Create.prototype.run = function(forward) {
     for (var i = 0, id; id = this.ids[i]; i++) {
       var block = workspace.getBlockById(id);
       if (block) {
-        block.dispose(false, true);
+        block.dispose(false, false);
       } else if (id == this.blockId) {
         // Only complain about root-level block.
         console.warn("Can't uncreate non-existant block: " + id);
@@ -456,7 +456,7 @@ Blockly.Events.Delete.prototype.run = function(forward) {
     for (var i = 0, id; id = this.ids[i]; i++) {
       var block = workspace.getBlockById(id);
       if (block) {
-        block.dispose(false, true);
+        block.dispose(false, false);
       } else if (id == this.blockId) {
         // Only complain about root-level block.
         console.warn("Can't delete non-existant block: " + id);
diff --git a/core/workspace_svg.js b/core/workspace_svg.js
index 8e7db32ea..c2c46ad00 100644
--- a/core/workspace_svg.js
+++ b/core/workspace_svg.js
@@ -913,7 +913,7 @@ Blockly.WorkspaceSvg.prototype.playAudio = function(name, opt_volume) {
   if (sound) {
     // Don't play one sound on top of another.
     var now = new Date();
-    if (now - this.lastSound_ < Blockly.Blockly.SOUND_LIMIT) {
+    if (now - this.lastSound_ < Blockly.SOUND_LIMIT) {
       return;
     }
     this.lastSound_ = now;