diff --git a/Classes/PHPExcel/Cell/DefaultValueBinder.php b/Classes/PHPExcel/Cell/DefaultValueBinder.php
index a9dae410..252048f7 100644
--- a/Classes/PHPExcel/Cell/DefaultValueBinder.php
+++ b/Classes/PHPExcel/Cell/DefaultValueBinder.php
@@ -57,13 +57,20 @@ class PHPExcel_Cell_DefaultValueBinder implements PHPExcel_Cell_IValueBinder
         // sanitize UTF-8 strings
         if (is_string($value)) {
             $value = PHPExcel_Shared_String::SanitizeUTF8($value);
+        } elseif (is_object($value)) {
+            // Handle any objects that might be injected
+            if ($value instanceof DateTime) {
+                $value = $value->format('Y-m-d H:i:s');
+            } elseif (!($value instanceof PHPExcel_RichText)) {
+                $value = (string) $value;
+            }
         }
 
         // Set value explicit
         $cell->setValueExplicit( $value, self::dataTypeForValue($value) );
 
         // Done!
-        return TRUE;
+        return true;
     }
 
     /**
@@ -74,7 +81,7 @@ class PHPExcel_Cell_DefaultValueBinder implements PHPExcel_Cell_IValueBinder
      */
     public static function dataTypeForValue($pValue = null) {
         // Match the value against a few data types
-        if (is_null($pValue)) {
+        if ($pValue === null) {
             return PHPExcel_Cell_DataType::TYPE_NULL;
         } elseif ($pValue === '') {
             return PHPExcel_Cell_DataType::TYPE_STRING;
diff --git a/unitTests/Classes/PHPExcel/Cell/DefaultValueBinderTest.php b/unitTests/Classes/PHPExcel/Cell/DefaultValueBinderTest.php
index 59b1dd04..1c74d96f 100644
--- a/unitTests/Classes/PHPExcel/Cell/DefaultValueBinderTest.php
+++ b/unitTests/Classes/PHPExcel/Cell/DefaultValueBinderTest.php
@@ -4,6 +4,7 @@ require_once 'testDataFileIterator.php';
 
 class DefaultValueBinderTest extends PHPUnit_Framework_TestCase
 {
+    protected $cellStub;
 
     public function setUp()
     {
@@ -14,6 +15,48 @@ class DefaultValueBinderTest extends PHPUnit_Framework_TestCase
         require_once(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
 	}
 
+    protected function createCellStub()
+    {
+        // Create a stub for the Cell class.
+        $this->cellStub = $this->getMockBuilder('PHPExcel_Cell')
+            ->disableOriginalConstructor()
+            ->getMock();
+        // Configure the stub.
+        $this->cellStub->expects($this->any())
+             ->method('setValueExplicit')
+             ->will($this->returnValue(true));
+
+    }
+
+    /**
+     * @dataProvider binderProvider
+     */
+    public function testBindValue($value)
+	{
+		$this->createCellStub();
+        $binder = new PHPExcel_Cell_DefaultValueBinder();
+		$result = $binder->bindValue($this->cellStub, $value);
+		$this->assertTrue($result);
+	}
+
+    public function binderProvider()
+    {
+        return array(
+            array(null),
+            array(''),
+            array('ABC'),
+            array('=SUM(A1:B2)'),
+            array(true),
+            array(false),
+            array(123),
+            array(-123.456),
+            array('123'),
+            array('-123.456'),
+            array('#REF!'),
+            array(new DateTime()),
+        );
+    }
+
     /**
      * @dataProvider providerDataTypeForValue
      */
@@ -21,7 +64,7 @@ class DefaultValueBinderTest extends PHPUnit_Framework_TestCase
 	{
 		$args = func_get_args();
 		$expectedResult = array_pop($args);
-		$result = call_user_func_array(array('PHPExcel_Cell_DefaultValueBinder','dataTypeForValue'),$args);
+		$result = call_user_func_array(array('PHPExcel_Cell_DefaultValueBinder','dataTypeForValue'), $args);
 		$this->assertEquals($expectedResult, $result);
 	}
 
@@ -30,4 +73,13 @@ class DefaultValueBinderTest extends PHPUnit_Framework_TestCase
     	return new testDataFileIterator('rawTestData/Cell/DefaultValueBinder.data');
 	}
 
+	public function testDataTypeForRichTextObject()
+	{
+        $objRichText = new PHPExcel_RichText();
+        $objRichText->createText('Hello World');
+
+        $expectedResult = PHPExcel_Cell_DataType::TYPE_INLINE;
+		$result = call_user_func(array('PHPExcel_Cell_DefaultValueBinder','dataTypeForValue'), $objRichText);
+		$this->assertEquals($expectedResult, $result);
+	}
 }