Bug 611893 - The form helper up arrow is incorrectly enabled on Google.com [r=mfinkle]

mobile/chrome/content/bindings.xml

@@ -1523,8 +1523,8 @@
           // buttons attributes sync with commands doesn not look updated when
           // we dynamically switch the "command" attribute so we need to ensure
           // the disabled state of the buttons is right when switching commands
-          this._previousButton.disabled = document.getElementById(aModel.commands.previous).disabled;
-          this._nextButton.disabled = document.getElementById(aModel.commands.next).disabled;
+          this._previousButton.disabled = document.getElementById(aModel.commands.previous).getAttribute("disabled") == "true";
+          this._nextButton.disabled = document.getElementById(aModel.commands.next).getAttribute("disabled") == "true";
 
           this.model = aModel;
           this.contentHasChanged();

mobile/chrome/content/browser-ui.js

@@ -1859,11 +1859,10 @@ var FormHelperUI = {
   },
 
   show: function formHelperShow(aElement, aHasPrevious, aHasNext) {
-    this._open = true;
-
     // Update the next/previous commands
     this._cmdPrevious.setAttribute("disabled", !aHasPrevious);
     this._cmdNext.setAttribute("disabled", !aHasNext);
+    this._open = true;
 
     let lastElement = this._currentElement || null;
     this._currentElement = {