diff --git a/README.md b/README.md
index 56fe331..d1ce4d0 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Now available on [NuGet](https://www.nuget.org/packages/Scallion)
 Execute the following command in the Package Manager Console:
 
 ```
-PM> Install-Package Scallion -Pre
+PM> Install-Package Scallion
 ```
 
 Or download an archive from [Releases](https://github.com/paralleltree/Scallion/releases).
diff --git a/Scallion.Tests/Properties/AssemblyInfo.cs b/Scallion.Tests/Properties/AssemblyInfo.cs
index 8f5b1b1..83615a8 100644
--- a/Scallion.Tests/Properties/AssemblyInfo.cs
+++ b/Scallion.Tests/Properties/AssemblyInfo.cs
@@ -11,4 +11,4 @@
 [assembly: ComVisible(false)]
 [assembly: Guid("2b69216b-f367-46a9-8d9b-56b16771019c")]
 
-[assembly: AssemblyVersion("0.9.0.1")]
+[assembly: AssemblyVersion("0.9.1.0")]
diff --git a/Scallion.Tests/Scallion.Tests.csproj b/Scallion.Tests/Scallion.Tests.csproj
index ab4b983..e2c2081 100644
--- a/Scallion.Tests/Scallion.Tests.csproj
+++ b/Scallion.Tests/Scallion.Tests.csproj
@@ -63,6 +63,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Internal\HelperExtensions.cs" />
+    <Compile Include="UnitTests\Core\MoSerializerTest.cs" />
     <Compile Include="UnitTests\DomainModels\MotionTest.cs" />
     <Compile Include="UnitTests\IOTest.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
diff --git a/Scallion.Tests/UnitTests/Core/MoSerializerTest.cs b/Scallion.Tests/UnitTests/Core/MoSerializerTest.cs
new file mode 100644
index 0000000..6cdf40f
--- /dev/null
+++ b/Scallion.Tests/UnitTests/Core/MoSerializerTest.cs
@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+using NUnit.Framework;
+using Scallion.DomainModels;
+using Scallion.DomainModels.Components;
+
+namespace Scallion.Tests.UnitTests.Core
+{
+    [TestFixture]
+    internal class MoSerializerTest
+    {
+        [Test]
+        public void WriteLongStringTest()
+        {
+            Assert.DoesNotThrow(() =>
+            {
+                var m = new Motion()
+                {
+                    ModelName = "テストモデル"
+                };
+
+                // Add a bone whose name length is longer than the maximum.
+                m.Bones.Add(new Bone()
+                {
+                    Name = "テストモデルのテストボーン",
+                    KeyFrames = new List<BoneKeyFrame>() { new BoneKeyFrame() }
+                });
+
+                // Then, try to save it.
+                m.Save("out.vmd");
+            }, "An error occurred while saving a Motion.");
+        }
+    }
+}
diff --git a/Scallion/Core/MoSerializer.cs b/Scallion/Core/MoSerializer.cs
index f7b9fe3..3aab1f6 100644
--- a/Scallion/Core/MoSerializer.cs
+++ b/Scallion/Core/MoSerializer.cs
@@ -80,7 +80,8 @@ public void WriteByte(byte value)
         public void WriteByteString(string value, int bytesCount)
         {
             var data = new byte[bytesCount];
-            FileEncoding.GetBytes(value).CopyTo(data, 0);
+            var arr = FileEncoding.GetBytes(value);
+            Array.Copy(arr, data, Math.Min(bytesCount, arr.Length));
             _stream.Write(data);
         }
 
diff --git a/Scallion/DomainModels/Motion.cs b/Scallion/DomainModels/Motion.cs
index 8244fc6..3c0cbcc 100644
--- a/Scallion/DomainModels/Motion.cs
+++ b/Scallion/DomainModels/Motion.cs
@@ -62,6 +62,11 @@ public IEnumerable<IKBone> IKBones
         /// </summary>
         public Motion()
         {
+            Bones = new List<Bone>();
+            Morphs = new List<Morph>();
+            Camera = new Camera();
+            Light = new Light();
+            SelfShadow = new SelfShadow();
             VisibilityKeyFrames = new List<VisibilityKeyFrame>();
         }
 
diff --git a/Scallion/Properties/AssemblyInfo.cs b/Scallion/Properties/AssemblyInfo.cs
index bc6433a..27960b9 100644
--- a/Scallion/Properties/AssemblyInfo.cs
+++ b/Scallion/Properties/AssemblyInfo.cs
@@ -11,8 +11,8 @@
 [assembly: ComVisible(false)]
 [assembly: Guid("3934e015-89f5-4214-80df-71b57f62c2cd")]
 
-[assembly: AssemblyVersion("0.9.0.1")]
-[assembly: AssemblyInformationalVersion("0.9.0")]
+[assembly: AssemblyVersion("0.9.1.0")]
+[assembly: AssemblyInformationalVersion("0.9.1")]
 
 // Exposes internal components to the testing project.
 [assembly: InternalsVisibleTo("Scallion.Tests")]