diff --git a/lib/ace/conf/keybindings/default_mac.js b/lib/ace/conf/keybindings/default_mac.js
index ebb42832..d027d031 100644
--- a/lib/ace/conf/keybindings/default_mac.js
+++ b/lib/ace/conf/keybindings/default_mac.js
@@ -80,7 +80,7 @@ return {
     "selectlinestart": "Shift-Home",
     "selectlineend": "Shift-End",
     "del": "Delete",
-    "backspace": "Backspace",
+    "backspace": "Ctrl-Backspace|Command-Backspace|Option-Backspace|Backspace",
     "outdent": "Shift-Tab",
     "indent": "Tab"
 };
diff --git a/lib/ace/layer/text.js b/lib/ace/layer/text.js
index 4651687d..08f3670a 100644
--- a/lib/ace/layer/text.js
+++ b/lib/ace/layer/text.js
@@ -146,7 +146,7 @@ var Text = function(parentEl) {
     this.updateLines = function(layerConfig, firstRow, lastRow) {
         this.$computeTabString();
         this.config = layerConfig;
-
+        
         var first = Math.max(firstRow, layerConfig.firstRow);
         var last = Math.min(lastRow, layerConfig.lastRow);
 
diff --git a/lib/ace/renderloop.js b/lib/ace/renderloop.js
index 2adcdf03..9a8ea34f 100644
--- a/lib/ace/renderloop.js
+++ b/lib/ace/renderloop.js
@@ -48,16 +48,17 @@ var RenderLoop = function(onRender) {
 (function() {
 
     this.schedule = function(change) {
-//        this.onRender(change);
-//        return;
+        //this.onRender(change);
+        //return;
         this.changes = this.changes | change;
         if (!this.pending) {
             this.pending = true;
             var _self = this;
             this.setTimeoutZero(function() {
                 _self.pending = false;
-                _self.onRender(_self.changes);
+                var changes = _self.changes;
                 _self.changes = 0;
+                _self.onRender(changes);
             })
         }
     };
diff --git a/lib/ace/scrollbar.js b/lib/ace/scrollbar.js
index ec7f0197..576b5ab4 100644
--- a/lib/ace/scrollbar.js
+++ b/lib/ace/scrollbar.js
@@ -62,7 +62,7 @@ var ScrollBar = function(parent) {
     oop.implement(this, MEventEmitter);
 
     this.onScroll = function() {
-      this.$dispatchEvent("scroll", {data: this.element.scrollTop});
+        this.$dispatchEvent("scroll", {data: this.element.scrollTop});
     };
 
     this.getWidth = function() {
diff --git a/lib/ace/virtual_renderer.js b/lib/ace/virtual_renderer.js
index f1bac711..11869f63 100644
--- a/lib/ace/virtual_renderer.js
+++ b/lib/ace/virtual_renderer.js
@@ -334,7 +334,7 @@ var VirtualRenderer = function(container, theme) {
     this.$renderChanges = function(changes) {
         if (!changes || !this.doc || !this.$tokenizer)
             return;
-
+        
         // text, scrolling and resize changes can cause the view port size to change
         if (!this.layerConfig ||
             changes & this.CHANGE_FULL ||
@@ -373,7 +373,7 @@ var VirtualRenderer = function(container, theme) {
             this.showGutter && this.$gutterLayer.update(this.layerConfig);
         }
         else if (changes & this.CHANGE_LINES) {
-            this.$updateLines();     
+            this.$updateLines();
             this.$updateScrollBar();       
         } if (changes & this.CHANGE_GUTTER) {
             this.showGutter && this.$gutterLayer.update(this.layerConfig);