--- a/mobile/chrome/content/bindings/arrowbox.xml
+++ b/mobile/chrome/content/bindings/arrowbox.xml
@@ -123,32 +123,32 @@
               if (horizPos == 0) {
                 container.orient = "vertical";
                 arrowbox.orient = "";
                 if (vertPos == 0) {
                   hideArrow = true;
                 } else {
                   arrowbox.style.marginLeft = ((anchorRect.left - popupRect.left) + (anchorRect.width / 2) - HALF_ARROW_WIDTH) + "px";
                   if (vertPos == 1) {
-                    container.dir = "ltr"; 
+                    container.dir = "normal"; 
                     anchorClass = "top";
                   } else if (vertPos == -1) {
                     container.dir = "reverse"; 
                     anchorClass = "bottom";
                   }
                 }
               } else if (vertPos == 0) {
                 container.orient = "";
                 arrowbox.orient = "vertical";
                 arrowbox.style.marginTop = ((anchorRect.top - popupRect.top) + (anchorRect.height / 2) - HALF_ARROW_WIDTH) + "px";
                 if (horizPos == 1) {
                   container.dir = "ltr"; 
                   anchorClass = "left";
                 } else if (horizPos == -1) {
-                  container.dir = "reverse";
+                  container.dir = "rtl";
                   anchorClass = "right";
                 }
               } else {
                 hideArrow = true;
               }
               arrow.hidden = hideArrow;
               arrow.setAttribute("side", anchorClass);
             ]]>