Added invalidate of the cell map as well, since we don't know what has changed

layout/html/table/src/nsTableFrame.cpp

@@ -2982,6 +2982,8 @@ NS_METHOD nsTableFrame::IR_TargetIsMe(nsIPresContext&        aPresContext,
     break;
   
   case nsIReflowCommand::ReflowDirty:
+    // Problem is we don't know has changed, so assume the worst
+    InvalidateCellMap();
     InvalidateFirstPassCache();
     InvalidateColumnCache();
     InvalidateColumnWidths();

layout/tables/nsTableFrame.cpp

@@ -2982,6 +2982,8 @@ NS_METHOD nsTableFrame::IR_TargetIsMe(nsIPresContext&        aPresContext,
     break;
   
   case nsIReflowCommand::ReflowDirty:
+    // Problem is we don't know has changed, so assume the worst
+    InvalidateCellMap();
     InvalidateFirstPassCache();
     InvalidateColumnCache();
     InvalidateColumnWidths();