diff -r a6c71e376889 -r 3d1612be40bc rt/vm/src/main/java/org/apidesign/vm4brwsr/VM.java
--- a/rt/vm/src/main/java/org/apidesign/vm4brwsr/VM.java	Sun Oct 20 20:36:03 2013 +0200
+++ b/rt/vm/src/main/java/org/apidesign/vm4brwsr/VM.java	Thu Nov 07 09:41:45 2013 +0100
@@ -137,13 +137,17 @@
         out.append(
               "  return vm;\n"
             + "  };\n"
+            + "  function mangleClass(name) {\n"
+            + "    return name.replace__Ljava_lang_String_2Ljava_lang_CharSequence_2Ljava_lang_CharSequence_2(\n"
+            + "      '_', '_1').replace__Ljava_lang_String_2CC('.','_');\n"
+            + "  };\n"
             + "  global.bck2brwsr = function() {\n"
             + "    var args = Array.prototype.slice.apply(arguments);\n"
             + "    var vm = fillInVMSkeleton({});\n"
             + "    var loader = {};\n"
             + "    loader.vm = vm;\n"
             + "    loader.loadClass = function(name) {\n"
-            + "      var attr = name.replace__Ljava_lang_String_2CC('.','_');\n"
+            + "      var attr = mangleClass(name);\n"
             + "      var fn = vm[attr];\n"
             + "      if (fn) return fn(false);\n"
             + "      return vm.org_apidesign_vm4brwsr_VMLazy(false).\n"
@@ -154,7 +158,7 @@
             + "    }\n"
             + "    vm.loadClass = loader.loadClass;\n"
             + "    vm._reload = function(name, byteCode) {;\n"
-            + "      var attr = name.replace__Ljava_lang_String_2CC('.','_');\n"
+            + "      var attr = mangleClass(name);\n"
             + "      delete vm[attr];\n"
             + "      return vm.org_apidesign_vm4brwsr_VMLazy(false).\n"
             + "        reload__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_String_2_3Ljava_lang_Object_2_3B(loader, name, args, byteCode);\n"