diff --git a/ClosedXML/ClosedXML/ClosedXML/ClosedXML.csproj b/ClosedXML/ClosedXML/ClosedXML/ClosedXML.csproj
index d998123..3e55efc 100644
--- a/ClosedXML/ClosedXML/ClosedXML/ClosedXML.csproj
+++ b/ClosedXML/ClosedXML/ClosedXML/ClosedXML.csproj
@@ -137,6 +137,7 @@
     <Compile Include="Excel\CalcEngine\Functions\Database.cs" />
     <Compile Include="Excel\Misc\XLCallbackAction.cs" />
     <Compile Include="Excel\Misc\XLReentrantEnumerableSet.cs" />
+    <Compile Include="Excel\XLConstants.cs" />
     <Compile Include="XLHelper.cs" />
     <Compile Include="Excel\AutoFilters\XLFilteredColumn.cs" />
     <Compile Include="Excel\AutoFilters\XLCustomFilteredColumn.cs" />
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLConstants.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLConstants.cs
new file mode 100644
index 0000000..f01f06e
--- /dev/null
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLConstants.cs
@@ -0,0 +1,13 @@
+
+namespace ClosedXML.Excel
+{
+    //Use the class to store magic strings or variables.
+    internal static class XLConstants
+    {
+        internal static class Comment
+        {
+            internal const string ShapeTypeId = "#_x0000_t202";
+            internal const string AlternateShapeTypeId = "#_xssf_cell_comment";
+        }
+    }
+}
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
index 44b94d1..2625812 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
@@ -309,8 +309,7 @@
                     var comments = root.GetFirstChild<CommentList>().ChildElements;
 
                     // **** MAYBE FUTURE SHAPE SIZE SUPPORT
-                    // var shapes = wsPart.VmlDrawingParts.SelectMany(p => new System.Xml.XmlTextReader(p.GetStream()).Read()
-                    XDocument xdoc = XDocumentExtensions.Load(wsPart.VmlDrawingParts.First().GetStream(FileMode.Open));
+                    XDocument xdoc = GetCommentVmlFile(wsPart);
                     
                     foreach (Comment c in comments) {
                         // find cell by reference
@@ -329,13 +328,9 @@
                             LoadFont(runProperties, rt);
                         }
 
-                        var xml = xdoc.Root.Element("xml");
-                        XElement shape;
-                        if (xml != null)
-                            shape = xml.Elements().First(e => (string)e.Attribute("type") == "#_x0000_t202");
-                        else
-                            shape = xdoc.Root.Elements().First(e => (string)e.Attribute("type") == "#_x0000_t202" || (string)e.Attribute("type") == "#_xssf_cell_comment");
-
+                      
+                        XElement shape = GetCommentShape(xdoc);
+                       
                         LoadShapeProperties<IXLComment>(xlComment, shape);
 
                         var clientData = shape.Elements().First(e => e.Name.LocalName == "ClientData");
@@ -380,6 +375,46 @@
             LoadDefinedNames(workbook);
         }
 
+        #region Comment Helpers
+
+        private XDocument GetCommentVmlFile(WorksheetPart wsPart)
+        {
+            XDocument xdoc = null;
+
+            foreach (var vmlPart in wsPart.VmlDrawingParts)
+            {
+                xdoc = XDocumentExtensions.Load(vmlPart.GetStream(FileMode.Open));
+
+                //Probe for comments
+                if (xdoc.Root == null) continue;
+                var shape = GetCommentShape(xdoc);
+                if (shape != null) break;
+            }
+
+            if (xdoc == null) throw new Exception("Could not load comments file");
+            return xdoc;
+        }
+
+        private static XElement GetCommentShape(XDocument xdoc)
+        {
+            var xml = xdoc.Root.Element("xml");
+
+            XElement shape;
+            if (xml != null)
+                shape =
+                    xml.Elements().FirstOrDefault(e => (string) e.Attribute("type") == XLConstants.Comment.ShapeTypeId);
+            else
+                shape = xdoc.Root.Elements().FirstOrDefault(e =>
+                                                            (string) e.Attribute("type") ==
+                                                            XLConstants.Comment.ShapeTypeId ||
+                                                            (string) e.Attribute("type") ==
+                                                            XLConstants.Comment.AlternateShapeTypeId);
+            return shape;
+        }
+
+        #endregion
+
+
         private String GetTableColumnName(string name)
         {
             return name.Replace("_x000a_", Environment.NewLine).Replace("_x005f_x000a_", "_x000a_");
diff --git a/ClosedXML/ClosedXML/ClosedXML_Net3.5/ClosedXML_Net3.5.csproj b/ClosedXML/ClosedXML/ClosedXML_Net3.5/ClosedXML_Net3.5.csproj
index 0b605cb..b73f954 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Net3.5/ClosedXML_Net3.5.csproj
+++ b/ClosedXML/ClosedXML/ClosedXML_Net3.5/ClosedXML_Net3.5.csproj
@@ -828,6 +828,9 @@
     <Compile Include="..\ClosedXML\Excel\Tables\XLTables.cs">
       <Link>Excel\Tables\XLTables.cs</Link>
     </Compile>
+    <Compile Include="..\ClosedXML\Excel\XLConstants.cs">
+      <Link>Excel\XLConstants.cs</Link>
+    </Compile>
     <Compile Include="..\ClosedXML\Excel\XLOutline.cs">
       <Link>Excel\XLOutline.cs</Link>
     </Compile>