+ Now storing item z separately from the DOM (as the DOM appears to be unreliable in our new world, at least at startup). This fixes issues with tabs not appearing in their groups at startup

browser/base/content/tabcandy/app/groups.js

@@ -542,6 +542,8 @@ window.Group.prototype = iQ.extend(new Item(), new Subscribable(), {
   // Function: setZ
   // Set the Z order for the group's container, as well as its children. 
   setZ: function(value) {
+    this.zIndex = value;
+
     iQ(this.container).css({zIndex: value});
 
     if(this.$debug) 

browser/base/content/tabcandy/app/items.js

@@ -65,6 +65,10 @@ window.Item = function() {
   // The position and size of this Item, represented as a <Rect>. 
   this.bounds = null;
   
+  // Variable: zIndex
+  // The z-index for this item. 
+  this.zIndex = 0;
+  
   // Variable: debug
   // When set to true, displays a rectangle on the screen that corresponds with bounds.
   // May be used for additional debugging features in the future.
@@ -291,7 +295,7 @@ window.Item.prototype = {
   // Function: getZ
   // Returns the zIndex of the Item.
   getZ: function() {
-    return parseInt(iQ(this.container).css('zIndex'));
+    return this.zIndex;
   },
 
   // ----------

browser/base/content/tabcandy/app/storage.js

@@ -55,9 +55,9 @@ Storage = {
       // us to check whether it's loaded or not so using a private one for
       // now.
       var alreadyReady = Utils.getCurrentWindow().__SSi;
-      if(alreadyReady)
+      if(alreadyReady) {
         callback();
-      else {    
+      } else {    
         var obsService =
           Components.classes["@mozilla.org/observer-service;1"]
           .getService(Components.interfaces.nsIObserverService);

browser/base/content/tabcandy/app/tabitems.js

@@ -356,6 +356,7 @@ window.TabItem.prototype = iQ.extend(new Item(), {
 
   // ----------
   setZ: function(value) {
+    this.zIndex = value;
     iQ(this.container).css({zIndex: value});
   },