diff --git modules/overlay/overlay-parent.js modules/overlay/overlay-parent.js
index a07ae33..427965a 100644
--- modules/overlay/overlay-parent.js
+++ modules/overlay/overlay-parent.js
@@ -392,7 +392,7 @@ Drupal.overlay.bindChild = function (iFrameWindow, isClosing) {
   // Setting tabIndex makes the div focusable.
   $iFrameDocument.attr('tabindex', -1);
 
-  $('.ui-dialog-titlebar-close-bg').animate({opacity: 0.9999}, 'fast');
+  $('.ui-dialog-titlebar-close-bg').animate({opacity: 1}, 'fast');
 
   // Perform animation to show the iframe element.
   self.iframe.$element.fadeIn('fast', function () {
@@ -709,7 +709,7 @@ Drupal.overlay.resize = function (size) {
       $('.ui-widget-overlay').height($(document).height());
 
       // Animate body opacity, so we fade in the page as it loads in.
-      $(self.iframe.$element.get(0)).contents().find('body.overlay').animate({opacity: 0.9999}, 'slow');
+      $(self.iframe.$element.get(0)).contents().find('body.overlay').animate({opacity: 1}, 'slow');
     }
   });
 };