diff --git a/static/js/ace2_inner.js b/static/js/ace2_inner.js
index 6c8ec60e..bb45ac5f 100644
--- a/static/js/ace2_inner.js
+++ b/static/js/ace2_inner.js
@@ -5657,31 +5657,17 @@ function OUTER(gscope)
   {
     var newNumLines = rep.lines.length();
     if (newNumLines < 1) newNumLines = 1;
-    if (newNumLines != lineNumbersShown)
-    {
-      var container = sideDivInner;
-      var odoc = outerWin.document;
-      while (lineNumbersShown < newNumLines)
-      {
-        lineNumbersShown++;
-        var n = lineNumbersShown;
-        var div = odoc.createElement("DIV");
-        div.appendChild(odoc.createTextNode(String(n)));
-        container.appendChild(div);
-      }
-      while (lineNumbersShown > newNumLines)
-      {
-        container.removeChild(container.lastChild);
-        lineNumbersShown--;
-      }
-    }
-
+	//update height of all current line numbers
     if (currentCallStack && currentCallStack.domClean)
     {
       var a = sideDivInner.firstChild;
       var b = doc.body.firstChild;
+      var n = 0;
       while (a && b)
       {
+	if(n > lineNumbersShown) //all updated, break
+	  break;
+
         var h = (b.clientHeight || b.offsetHeight);
         if (b.nextSibling)
         {
@@ -5695,10 +5681,42 @@ function OUTER(gscope)
         if (h)
         {
           var hpx = h + "px";
-          if (a.style.height != hpx) a.style.height = hpx;
+          if (a.style.height != hpx) {
+	    a.style.height = hpx;
+	  }
         }
         a = a.nextSibling;
         b = b.nextSibling;
+	n++;
+      }
+    }	
+	
+    if (newNumLines != lineNumbersShown)
+    {
+      var container = sideDivInner;
+      var odoc = outerWin.document;
+      var fragment = odoc.createDocumentFragment();
+      while (lineNumbersShown < newNumLines)
+      {
+        lineNumbersShown++;
+        var n = lineNumbersShown;
+        var div = odoc.createElement("DIV");	
+	//calculate height for new line number
+	var h = (b.clientHeight || b.offsetHeight);
+	if (b.nextSibling)
+	  h = b.nextSibling.offsetTop - b.offsetTop;
+	if(h) // apply style to div
+	  div.style.height = h +"px";
+			
+        div.appendChild(odoc.createTextNode(String(n)));
+	fragment.appendChild(div);
+	b = b.nextSibling;
+      }
+      container.appendChild(fragment);
+      while (lineNumbersShown > newNumLines)
+      {
+        container.removeChild(container.lastChild);
+        lineNumbersShown--;
       }
     }
   }