diff --git a/mozilla/layout/mathml/base/src/nsMathMLmtableFrame.cpp b/mozilla/layout/mathml/base/src/nsMathMLmtableFrame.cpp
index 6da99a191de..b72a748a5f9 100644
--- a/mozilla/layout/mathml/base/src/nsMathMLmtableFrame.cpp
+++ b/mozilla/layout/mathml/base/src/nsMathMLmtableFrame.cpp
@@ -174,8 +174,6 @@ NS_NewMathMLmtdFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
   if (nsnull == it) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
-// XXX RBS -  what about mFlags ?
-// it->SetFlags(NS_AREA_WRAP_SIZE); ?
   *aNewFrame = it;
   return NS_OK;
 }
@@ -193,15 +191,11 @@ nsMathMLmtdFrame::Reflow(nsIPresContext*          aPresContext,
                          nsHTMLReflowMetrics&     aDesiredSize,
                          const nsHTMLReflowState& aReflowState,
                          nsReflowStatus&          aStatus)
-
 {
-  nsresult  rv = NS_OK;
-   
   // Let the base class do the reflow
-  rv = nsAreaFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
+  nsresult rv = nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
 
   // more about <maligngroup/> and <malignmark/> later
   // ...
-  
   return rv;
 }
diff --git a/mozilla/layout/mathml/base/src/nsMathMLmtableFrame.h b/mozilla/layout/mathml/base/src/nsMathMLmtableFrame.h
index db9191f8541..9e8d1a4a37c 100644
--- a/mozilla/layout/mathml/base/src/nsMathMLmtableFrame.h
+++ b/mozilla/layout/mathml/base/src/nsMathMLmtableFrame.h
@@ -138,6 +138,8 @@ public:
     return NS_OK;
   }
 
+  // overloaded nsTableOuterFrame methods
+
   NS_IMETHOD
   Init(nsIPresContext*  aPresContext,
        nsIContent*      aContent,
@@ -171,7 +173,7 @@ protected:
 
 // --------------
 
-class nsMathMLmtdFrame : public nsAreaFrame {
+class nsMathMLmtdFrame : public nsBlockFrame {
 public:
   friend nsresult NS_NewMathMLmtdFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame);