Index: popups.js
===================================================================
--- popups.js	(revision 589)
+++ popups.js	(working copy)
@@ -142,7 +142,7 @@
   // Get popups's height on the page.
   // Causes flash in FF2 if popups is not visible!
   var popupHeight = $popups.height(); 
-  var windowHeight = $(window).height();
+  var windowHeight = $.browser.opera && $.browser.version > "9.5" && $.fn.jquery <= "1.2.6" ? document.documentElement["clientHeight"] : $(window).height();
   if (popupHeight > (0.9 * windowHeight) ) { // Must fit in 90% of window.
     popupHeight = 0.9 * windowHeight;
     $popups.height(popupHeight);