diff -r 6c4d0ddbe997 toolkit/spatial-navigation/SpatialNavigation.js
--- a/toolkit/spatial-navigation/SpatialNavigation.js	Tue Nov 04 14:05:31 2008 -0800
+++ b/toolkit/spatial-navigation/SpatialNavigation.js	Thu Nov 06 19:25:57 2008 -0400
@@ -240,7 +240,7 @@ function _focusNextUsingCmdDispatcher(ev
     var windowMediator = Cc['@mozilla.org/appshell/window-mediator;1'].getService(Ci.nsIWindowMediator);
     var window = windowMediator.getMostRecentWindow("navigator:browser");
 
-    if (event.keyCode == PrefObserver['keyCodeRight'] || event.keyCode != PrefObserver['keyCodeDown']) {
+    if (event.keyCode == PrefObserver['keyCodeRight'] || event.keyCode == PrefObserver['keyCodeDown']) {
       window.document.commandDispatcher.advanceFocus();
     } else {
       window.document.commandDispatcher.rewindFocus();