diff --git a/unpacked/jax/output/HTML-CSS/autoload/menclose.js b/unpacked/jax/output/HTML-CSS/autoload/menclose.js
index 81fd2b309..35ac3f0e7 100644
--- a/unpacked/jax/output/HTML-CSS/autoload/menclose.js
+++ b/unpacked/jax/output/HTML-CSS/autoload/menclose.js
@@ -1,3 +1,5 @@
+/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
 /*************************************************************
  *
  *  MathJax/jax/output/HTML-CSS/autoload/menclose.js
@@ -36,12 +38,12 @@ MathJax.Hub.Register.StartupHook("HTML-CSS Jax Ready",function () {
       if (values.color && !this.mathcolor) {values.mathcolor = values.color}
       if (values.thickness == null) {values.thickness = ".075em"}
       if (values.padding == null)   {values.padding   = ".2em"}
+      span = this.HTMLcreateSpan(span);
       var mu = this.HTMLgetMu(span), scale = this.HTMLgetScale();
       var p = HTMLCSS.length2em(values.padding,mu,1/HTMLCSS.em) * scale;  // padding for enclosure
       var t = HTMLCSS.length2em(values.thickness,mu,1/HTMLCSS.em);        // thickness of lines (not scaled, see issue #414)
       var SOLID = HTMLCSS.Em(t)+" solid";
 
-      span = this.HTMLcreateSpan(span);
       var stack = HTMLCSS.createStack(span);
       var base = HTMLCSS.createBox(stack);
       this.HTMLmeasureChild(0,base);
diff --git a/unpacked/jax/output/HTML-CSS/autoload/mmultiscripts.js b/unpacked/jax/output/HTML-CSS/autoload/mmultiscripts.js
index 3c3bd4587..41c39c3fd 100644
--- a/unpacked/jax/output/HTML-CSS/autoload/mmultiscripts.js
+++ b/unpacked/jax/output/HTML-CSS/autoload/mmultiscripts.js
@@ -1,3 +1,5 @@
+/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
 /*************************************************************
  *
  *  MathJax/jax/output/HTML-CSS/autoload/mmultiscripts.js
@@ -43,7 +45,17 @@ MathJax.Hub.Register.StartupHook("HTML-CSS Jax Ready",function () {
       var BOX = this.HTMLgetScripts(stack,s);
       var sub = BOX[0], sup = BOX[1], presub = BOX[2], presup = BOX[3];
 
-      var sscale = (this.data[1]||this).HTMLgetScale();
+      // <mmultiscripts> children other than the base can be <none/>,
+      // <mprescripts/>, <mrow></mrow> etc so try to get HTMLgetScale from the
+      // first element with a spanID. See issue 362.
+      var sscale = this.HTMLgetScale();
+      for (var i = 1; i < this.data.length; i++) {
+        if (this.data[i] && this.data[i].spanID) {
+          sscale = this.data[i].HTMLgetScale();
+          break;
+        }
+      }
+
       var q = HTMLCSS.TeX.sup_drop * sscale, r = HTMLCSS.TeX.sub_drop * sscale;
       var u = base.bbox.h - q, v = base.bbox.d + r, delta = 0, p;
       if (base.bbox.ic) {delta = base.bbox.ic}
diff --git a/unpacked/jax/output/HTML-CSS/jax.js b/unpacked/jax/output/HTML-CSS/jax.js
index 4517dc3f2..2a6036fe4 100644
--- a/unpacked/jax/output/HTML-CSS/jax.js
+++ b/unpacked/jax/output/HTML-CSS/jax.js
@@ -2531,7 +2531,14 @@
 	if (sup) {sup.bbox.w += s; sup.bbox.rw = Math.max(sup.bbox.w,sup.bbox.rw)}
 	if (sub) {sub.bbox.w += s; sub.bbox.rw = Math.max(sub.bbox.w,sub.bbox.rw)}
 	HTMLCSS.placeBox(base,0,0);
-	var sscale = (this.data[this.sup] || this.data[this.sub] || this).HTMLgetScale();
+        var sscale;
+        if (sup) {
+          sscale = this.data[this.sup].HTMLgetScale();
+        } else if (sub) {
+          sscale = this.data[this.sub].HTMLgetScale();
+        } else {
+          sscale = this.HTMLgetScale();
+        }
 	var q = HTMLCSS.TeX.sup_drop * sscale, r = HTMLCSS.TeX.sub_drop * sscale;
 	var u = base.bbox.h - q, v = base.bbox.d + r, delta = 0, p;
 	if (base.bbox.ic) {