diff --git a/layout/mathml/nsMathMLmencloseFrame.cpp b/layout/mathml/nsMathMLmencloseFrame.cpp
index 4b8d4e9ebf0..f5890722bee 100644
--- a/layout/mathml/nsMathMLmencloseFrame.cpp
+++ b/layout/mathml/nsMathMLmencloseFrame.cpp
@@ -170,9 +170,14 @@ nsresult nsMathMLmencloseFrame::AddNotation(const nsAString& aNotation)
  */
 void nsMathMLmencloseFrame::InitNotations()
 {
+  mNotationsToDraw = 0;
+  mLongDivCharIndex = mRadicalCharIndex = -1;
+  mMathMLChar.Clear();
+
   nsAutoString value;
 
-  if (mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::notation_, value)) {
+  if (GetAttribute(mContent, mPresentationData.mstyle, nsGkAtoms::notation_,
+                   value)) {
     // parse the notation attribute
     nsWhitespaceTokenizer tokenizer(value);
 
@@ -186,19 +191,6 @@ void nsMathMLmencloseFrame::InitNotations()
   }
 }
 
-NS_IMETHODIMP
-nsMathMLmencloseFrame::Init(nsIContent*      aContent,
-                            nsIFrame*        aParent,
-                            nsIFrame*        aPrevInFlow)
-{
-  nsresult rv = nsMathMLContainerFrame::Init(aContent, aParent, aPrevInFlow);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  InitNotations();
-
-  return NS_OK;
-}
-
 NS_IMETHODIMP
 nsMathMLmencloseFrame::InheritAutomaticData(nsIFrame* aParent)
 {
@@ -207,6 +199,8 @@ nsMathMLmencloseFrame::InheritAutomaticData(nsIFrame* aParent)
 
   mPresentationData.flags |= NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY;
 
+  InitNotations();
+
   return NS_OK;
 }
 
@@ -702,10 +696,6 @@ nsMathMLmencloseFrame::AttributeChanged(PRInt32         aNameSpaceID,
                                         PRInt32         aModType)
 {
   if (aAttribute == nsGkAtoms::notation_) {
-    mNotationsToDraw = 0;
-    mLongDivCharIndex = mRadicalCharIndex = -1;
-    mMathMLChar.Clear();
-    
     InitNotations();
   }
 
diff --git a/layout/mathml/nsMathMLmencloseFrame.h b/layout/mathml/nsMathMLmencloseFrame.h
index 5040b480f63..b36c125d56f 100644
--- a/layout/mathml/nsMathMLmencloseFrame.h
+++ b/layout/mathml/nsMathMLmencloseFrame.h
@@ -104,11 +104,6 @@ public:
   virtual nsStyleContext*
   GetAdditionalStyleContext(PRInt32 aIndex) const;
 
-  NS_IMETHOD
-  Init(nsIContent* aContent,
-       nsIFrame*   aParent,
-       nsIFrame*   aPrevInFlow);
-
   NS_IMETHOD BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                               const nsRect&           aDirtyRect,
                               const nsDisplayListSet& aLists);
diff --git a/layout/mathml/nsMathMLmsqrtFrame.cpp b/layout/mathml/nsMathMLmsqrtFrame.cpp
index 9eb11c52b68..f2e3a9f32b6 100644
--- a/layout/mathml/nsMathMLmsqrtFrame.cpp
+++ b/layout/mathml/nsMathMLmsqrtFrame.cpp
@@ -84,6 +84,16 @@ nsMathMLmsqrtFrame::Init(nsIContent*      aContent,
   return rv;
 }
 
+NS_IMETHODIMP
+nsMathMLmsqrtFrame::InheritAutomaticData(nsIFrame* aParent)
+{
+  nsMathMLContainerFrame::InheritAutomaticData(aParent);
+
+  mPresentationData.flags |= NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY;
+
+  return NS_OK;
+}
+
 NS_IMETHODIMP
 nsMathMLmsqrtFrame::AttributeChanged(PRInt32         aNameSpaceID,
                                      nsIAtom*        aAttribute,
diff --git a/layout/mathml/nsMathMLmsqrtFrame.h b/layout/mathml/nsMathMLmsqrtFrame.h
index 939888249ba..94404bd8ea6 100644
--- a/layout/mathml/nsMathMLmsqrtFrame.h
+++ b/layout/mathml/nsMathMLmsqrtFrame.h
@@ -79,6 +79,9 @@ public:
        nsIFrame*   aParent,
        nsIFrame*   aPrevInFlow);
 
+  NS_IMETHOD
+  InheritAutomaticData(nsIFrame* aParent);
+
   NS_IMETHOD
   AttributeChanged(PRInt32         aNameSpaceID,
                    nsIAtom*        aAttribute,