diff --git a/jquery-1.4.2.js b/jquery-1.4.2.js_
similarity index 100%
rename from jquery-1.4.2.js
rename to jquery-1.4.2.js_
diff --git a/ui/jquery.ui.autocomplete.js b/ui/jquery.ui.autocomplete.js
index f9607aef7..e992aadc3 100644
--- a/ui/jquery.ui.autocomplete.js
+++ b/ui/jquery.ui.autocomplete.js
@@ -41,7 +41,7 @@ $.widget( "ui.autocomplete", {
 				"aria-haspopup": "true"
 			})
 			.bind( "keydown.autocomplete", function( event ) {
-				if ( self.options.disabled ) {
+				if ( self.options.disabled || self.element.attr( "readonly" ) ) {
 					return;
 				}