diff --git a/unpacked/MathJax.js b/unpacked/MathJax.js
index 353c00ed9..f361e04fb 100644
--- a/unpacked/MathJax.js
+++ b/unpacked/MathJax.js
@@ -1896,6 +1896,8 @@ MathJax.Hub = {
       mpContext: false,    //  true means pass menu events to MathPlayer in IE
       mpMouse: false,      //  true means pass mouse events to MathPlayer in IE
       texHints: true,      //  include class names for TeXAtom elements
+      FastPreview: true,   //  use PreviewHTML output as preview?
+      assistiveMML: true,  //  include hidden MathML for screen readers?
       inTabOrder: true,    //  set to false if math elements should be included in the tabindex
       semantics: false     //  add semantics tag with original form in MathML output
     },
@@ -2127,6 +2129,7 @@ MathJax.Hub = {
           if (script.MathJax.state !== STATE.PENDING) {this.scriptAction[action](script)}
         }
         if (!script.MathJax) {script.MathJax = {state: STATE.PENDING}}
+        if (script.MathJax.error) delete script.MathJax.error;
         if (script.MathJax.state !== STATE.PROCESSED) {state.scripts.push(script)}
       }
     }
@@ -2350,7 +2353,8 @@ MathJax.Hub = {
     if (err.line||err.lineNumber) message += "\n"+LOCALIZE("ErrorLine","line: %1",err.line||err.lineNumber);
     message += "\n\n"+LOCALIZE("ErrorTips","Debugging tips: use %1, inspect %2 in the browser console","'unpacked/MathJax.js'","'MathJax.Hub.lastError'");
     script.MathJax.error = MathJax.OutputJax.Error.Jax(message,script);
-
+    if (script.MathJax.elementJax)
+      script.MathJax.error.inputID = script.MathJax.elementJax.inputID;
     //
     //  Create the [Math Processing Error] span
     //
@@ -2359,28 +2363,23 @@ MathJax.Hub = {
     var error = MathJax.HTML.Element("span", {
       className:"MathJax_Error", jaxID:"Error", isMathJax:true,
       id: script.MathJax.error.inputID+"-Frame"
-    },errorText);
+    },[["span",null,errorText]]);
     //
     //  Attach the menu events
     //
-    if (MathJax.Extension.MathEvents) {
-      var EVENT = MathJax.Extension.MathEvents.Event;
+    MathJax.Ajax.Require("[MathJax]/extensions/MathEvents.js",function () {
+      var EVENT = MathJax.Extension.MathEvents.Event
+          HUB = MathJax.Hub;
       error.oncontextmenu = EVENT.Menu;
       error.onmousedown = EVENT.Mousedown;
       error.onkeydown = EVENT.Keydown;
-      error.tabIndex = this.getTabOrder(this.getJaxFor(script));
-    } else {
-      MathJax.Ajax.Require("[MathJax]/extensions/MathEvents.js",function () {
-        var EVENT = MathJax.Extension.MathEvents.Event;
-        error.oncontextmenu = EVENT.Menu;
-        error.onmousedown = EVENT.Mousedown;
-        error.keydown = EVENT.Keydown;
-        error.tabIndex = this.getTabOrder(this.getJaxFor(script));
-      });
-    }
+      error.tabIndex = HUB.getTabOrder(HUB.getJaxFor(script));
+    });
     //
     //  Insert the error into the page and remove any preview
     //
+    var node = document.getElementById(error.id);
+    if (node) node.parentNode.removeChild(node);
     script.parentNode.insertBefore(error,script);
     if (script.MathJax.preview) {script.MathJax.preview.innerHTML = ""}
     //
diff --git a/unpacked/config/default.js b/unpacked/config/default.js
index 6f92045d2..80e91a314 100644
--- a/unpacked/config/default.js
+++ b/unpacked/config/default.js
@@ -240,12 +240,17 @@ MathJax.Hub.Config({
     ALT: false,          //    require Alt or Option?
     CMD: false,          //    require CMD?
     Shift: false,        //    require Shift?
+    discoverable: false, //  make math menu discoverable on hover?
     zscale: "200%",      //  the scaling factor for MathZoom
+    renderer: "",        //  set when Jax are loaded
     font: "Auto",        //  what font HTML-CSS should use
     context: "MathJax",  //  or "Browser" for pass-through to browser menu
+    locale: "en",        //  the language to use for messages
     mpContext: false,    //  true means pass menu events to MathPlayer in IE
     mpMouse: false,      //  true means pass mouse events to MathPlayer in IE
     texHints: true,      //  include class names for TeXAtom elements
+    FastPreview: true,   //  use PreviewHTML output as preview?
+    assistiveMML: true,  //  include hidden MathML for screen readers?
     inTabOrder: true,    //  set to true if math elements should be included in the tabindex
     semantics: false     //  add semantics tag with original form in MathML output
   },
diff --git a/unpacked/extensions/MathMenu.js b/unpacked/extensions/MathMenu.js
index 360231487..956aa2d40 100644
--- a/unpacked/extensions/MathMenu.js
+++ b/unpacked/extensions/MathMenu.js
@@ -1543,16 +1543,16 @@
         ),
         ITEM.RULE(),
         ITEM.SUBMENU(["Renderer","Math Renderer"],    {hidden:!CONFIG.showRenderer},
-          ITEM.RADIO("HTML-CSS",   "renderer", {action: MENU.Renderer}),
-          ITEM.RADIO("Common HTML","renderer", {action: MENU.Renderer, value:"CommonHTML"}),
-          ITEM.RADIO("Fast HTML",  "renderer", {action: MENU.Renderer, value:"PreviewHTML"}),
-          ITEM.RADIO("MathML",     "renderer", {action: MENU.Renderer, value:"NativeMML"}),
-          ITEM.RADIO("SVG",        "renderer", {action: MENU.Renderer}),
-          ITEM.RADIO("PlainSource","renderer", {action: MENU.Renderer, value:"PlainSource"}),
+          ITEM.RADIO(["HTML-CSS","HTML-CSS"],       "renderer", {action: MENU.Renderer}),
+          ITEM.RADIO(["CommonHTML","Common HTML"],  "renderer", {action: MENU.Renderer, value:"CommonHTML"}),
+          ITEM.RADIO(["PreviewHTML","Preview HTML"],"renderer", {action: MENU.Renderer, value:"PreviewHTML"}),
+          ITEM.RADIO(["MathML","MathML"],           "renderer", {action: MENU.Renderer, value:"NativeMML"}),
+          ITEM.RADIO(["SVG","SVG"],                 "renderer", {action: MENU.Renderer}),
+          ITEM.RADIO(["PlainSource","Plain Source"],"renderer", {action: MENU.Renderer, value:"PlainSource"}),
           ITEM.RULE(),
-          ITEM.CHECKBOX("Fast Preview", "FastPreview"),
-          ITEM.CHECKBOX("Assistive MathML", "assistiveMML", {action:MENU.AssistiveMML}),
-          ITEM.CHECKBOX("Include in Tab Order", "inTabOrder")
+          ITEM.CHECKBOX(["FastPreview","Fast Preview"], "FastPreview"),
+          ITEM.CHECKBOX(["AssistiveMML","Assistive MathML"], "assistiveMML", {action:MENU.AssistiveMML}),
+          ITEM.CHECKBOX(["InTabOrder","Include in Tab Order"], "inTabOrder")
         ),
         ITEM.SUBMENU("MathPlayer",  {hidden:!HUB.Browser.isMSIE || !CONFIG.showMathPlayer,
                                                     disabled:!HUB.Browser.hasMathPlayer},
@@ -1579,7 +1579,7 @@
           ITEM.RADIO(["NeoEulerWeb","Neo Euler (web)"], "font", {action: MENU.Font})
         ),
         ITEM.SUBMENU(["ContextMenu","Contextual Menu"],    {hidden:!CONFIG.showContext},
-          ITEM.RADIO("MathJax", "context"),
+          ITEM.RADIO(["MathJax","MathJax"], "context"),
           ITEM.RADIO(["Browser","Browser"], "context")
         ),
         ITEM.COMMAND(["Scale","Scale All Math ..."],MENU.Scale),