Index: plugins/autocomplete/jquery.autocomplete.js
===================================================================
--- plugins/autocomplete/jquery.autocomplete.js	(revision 4817)
+++ plugins/autocomplete/jquery.autocomplete.js	(working copy)
@@ -363,7 +363,7 @@
 		if ( !value ) {
 			return [""];
 		}
-		var words = value.split( $.trim( options.multipleSeparator ) );
+		var words = value.split( options.multipleSeparator );
 		var result = [];
 		$.each(words, function(i, value) {
 			if ( $.trim(value) )