diff -r 691c5cd3fb93 -r 6dc2c6c752df rt/launcher/src/main/resources/org/apidesign/bck2brwsr/launcher/harness.xhtml
--- a/rt/launcher/src/main/resources/org/apidesign/bck2brwsr/launcher/harness.xhtml	Thu Apr 18 05:47:45 2013 +0200
+++ b/rt/launcher/src/main/resources/org/apidesign/bck2brwsr/launcher/harness.xhtml	Thu Apr 18 23:09:30 2013 +0200
@@ -38,8 +38,17 @@
         
         <script type="text/javascript">
             try {
-                var inst = vm.loadClass('org.apidesign.bck2brwsr.launcher.impl.Console').newInstance();
-                inst.harness('$U/../data');
+                (function() {
+                    var cls = vm.loadClass('org.apidesign.bck2brwsr.launcher.impl.Console');
+                    try {
+                        // bck2brwsr mangling
+                        cls.runHarness__VLjava_lang_String_2('$U/../data');
+                    } catch (err) {
+                        // fxbrwsr mangling
+                        var inst = cls.newInstance();
+                        inst.harness('$U/../data');
+                    }
+                })();
             } catch (err) { 
                 alert('Error executing harness: ' + err); 
             }