-Fixed deserializing a null string throwing a NullReferenceException

-Fixed JsonTextReader reading from a slow stream
-Fixed CultureInfo not being overridden on JsonSerializerProxy
-Fixed full trust security check in .NET 2.0 & .NET 3.5
-Improved writing JSON with indent performance

Src/Newtonsoft.Json.Tests/JsonConvertTest.cs

@@ -114,6 +114,20 @@ namespace Newtonsoft.Json.Tests
     }
 #endif
 
+    [Test]
+    public void DeserializeObject_EmptyString()
+    {
+      object result = JsonConvert.DeserializeObject(string.Empty);
+      Assert.IsNull(result);
+    }
+
+    [Test]
+    public void DeserializeObject_Integer()
+    {
+      object result = JsonConvert.DeserializeObject("1");
+      Assert.AreEqual(1L, result);
+    }
+
     [Test]
     public void EscapeJavaScriptString()
     {