Bug 303998 - home page location(s) input field scroll doesn't work properly on long URLs. r=mconnor.

toolkit/content/widgets/preferences.xml

@@ -354,8 +354,12 @@
             setValue(aElement, "checked", val);
           else if (aElement.localName == "colorpicker")
             setValue(aElement, "color", val);
-          else 
+          else if (this.getElementValue(aElement) != val) {
+            // XXXmano Bug 303998: Avoid a caret placement issue if either the
+            // preference observer or its setter calls updateElements as a result 
+            // of the input event handler.
             setValue(aElement, "value", val);
+          }
         ]]>
         </body>
       </method>