diff --git a/lib/ace/document.js b/lib/ace/document.js
index b11f604e..fe8f0284 100644
--- a/lib/ace/document.js
+++ b/lib/ace/document.js
@@ -44,6 +44,8 @@ var Selection = require("ace/selection").Selection;
 var TextMode = require("ace/mode/text").Mode;
 var Range = require("ace/range").Range;
 
+var NO_CHANGE_DELTAS = {};
+
 var Document = function(text, mode) {
     
     this.modified = true;
@@ -511,17 +513,20 @@ var Document = function(text, mode) {
         args.push.apply(args, lines);
         this.$lines.splice.apply(this.$lines, args);
 
+        var nl = this.$getNewLineCharacter();
         var delta = {
             action: "insertText",
             range: new Range(row, 0, row + lines.length, 0),
             text: lines.join(nl) + nl
         };
         if (!fromUndo && this.$undoManager) {
-            var nl = this.$getNewLineCharacter();
             this.$deltas.push(delta);
             this.$informUndoManager.schedule();
         }
-        this._dispatchEvent("changeDelta", { data: delta });
+        
+        if (fromUndo !== NO_CHANGE_DELTAS) {
+            this._dispatchEvent("changeDelta", { data: delta });
+        }
     },
 
     this.$insert = function(position, text, fromUndo) {
@@ -561,10 +566,10 @@ var Document = function(text, mode) {
             var lastLine = newLines[newLines.length - 1] + line.substring(position.column);
 
             this.$lines[position.row] = firstLine;
-            this.$insertLines(position.row + 1, [lastLine], true);
+            this.$insertLines(position.row + 1, [lastLine], NO_CHANGE_DELTAS);
 
             if (newLines.length > 2) {
-                this.$insertLines(position.row + 1, newLines.slice(1, -1), true);
+                this.$insertLines(position.row + 1, newLines.slice(1, -1), NO_CHANGE_DELTAS);
             }
 
             var end = {