diff --git a/source/Grabacr07.KanColleViewer/Application.Static.cs b/source/Grabacr07.KanColleViewer/Application.Static.cs
index 55c0a3487..03af1aa4c 100644
--- a/source/Grabacr07.KanColleViewer/Application.Static.cs
+++ b/source/Grabacr07.KanColleViewer/Application.Static.cs
@@ -19,7 +19,7 @@ partial class Application
 	{
 		static Application()
 		{
-			AppDomain.CurrentDomain.UnhandledException += (sender, args) => ReportException(sender, args.ExceptionObject as Exception);
+			AppDomain.CurrentDomain.UnhandledException += (sender, args) => ReportException("AppDomain", sender, args.ExceptionObject as Exception);
 
 			TelemetryClient = new TelemetryClient();
 			TelemetryClient.Context.Session.Id = Guid.NewGuid().ToString();
@@ -73,29 +73,29 @@ private static bool BootstrapProxy()
 			return vmodel.DialogResult;
 		}
 
-		private static void ReportException(object sender, Exception exception)
+		private static void ReportException(string caller, object sender, Exception exception)
 		{
-			var now = DateTimeOffset.Now;
-			var path = Path.Combine(
-				Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
-				ProductInfo.Company,
-				ProductInfo.Product,
-				"ErrorReports",
-				$"ErrorReport-{now:yyyyMMdd-HHmmss}-{now.Millisecond:000}.log");
-
-			var message = $@"*** Error Report ***
+			try
+			{
+				var now = DateTimeOffset.Now;
+				var path = Path.Combine(
+					Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
+					ProductInfo.Company,
+					ProductInfo.Product,
+					"ErrorReports",
+					$"ErrorReport-{now:yyyyMMdd-HHmmss}-{now.Millisecond:000}.log");
+
+				var message = $@"*** Error Report ({caller}) ***
 {ProductInfo.Product} ver.{ProductInfo.VersionString}
-{DateTimeOffset.Now}
+{now}
 
 {new SystemEnvironment()}
 
-Sender:    {sender.GetType().FullName}
-Exception: {exception.GetType().FullName}
+Sender:    {(sender is Type t ? t : sender?.GetType())?.FullName}
+Exception: {exception?.GetType().FullName}
 
 {exception}
 ";
-			try
-			{
 				// ReSharper disable once AssignNullToNotNullAttribute
 				Directory.CreateDirectory(Path.GetDirectoryName(path));
 				File.AppendAllText(path, message);
diff --git a/source/Grabacr07.KanColleViewer/Application.xaml.cs b/source/Grabacr07.KanColleViewer/Application.xaml.cs
index 906f85117..647175c88 100644
--- a/source/Grabacr07.KanColleViewer/Application.xaml.cs
+++ b/source/Grabacr07.KanColleViewer/Application.xaml.cs
@@ -69,7 +69,7 @@ protected override void OnStartup(StartupEventArgs e)
 			{
 				this.DispatcherUnhandledException += (sender, args) =>
 				{
-					ReportException(sender, args.Exception);
+					ReportException("Dispatcher", sender, args.Exception);
 					args.Handled = true;
 				};
 
diff --git a/source/Grabacr07.KanColleViewer/Properties/AssemblyInfo.cs b/source/Grabacr07.KanColleViewer/Properties/AssemblyInfo.cs
index 4e6d9b8db..a8f20f126 100644
--- a/source/Grabacr07.KanColleViewer/Properties/AssemblyInfo.cs
+++ b/source/Grabacr07.KanColleViewer/Properties/AssemblyInfo.cs
@@ -15,4 +15,4 @@
 	ResourceDictionaryLocation.None,
 	ResourceDictionaryLocation.SourceAssembly)]
 
-[assembly: AssemblyVersion("4.5.0.2")]
+[assembly: AssemblyVersion("4.5.1")]
diff --git a/source/Grabacr07.KanColleViewer/Views/KanColleWindow.xaml.cs b/source/Grabacr07.KanColleViewer/Views/KanColleWindow.xaml.cs
index 36e999dc8..318877cf5 100644
--- a/source/Grabacr07.KanColleViewer/Views/KanColleWindow.xaml.cs
+++ b/source/Grabacr07.KanColleViewer/Views/KanColleWindow.xaml.cs
@@ -47,12 +47,12 @@ private void ChangeSizeByBrowser(Size browserSize)
 				if (this.previousDock == Dock.Top || this.previousDock == Dock.Bottom)
 				{
 					var diffW = this.previousBrowserSize.Value.Width - browserSize.Width;
-					if (Math.Abs(diffW) > 0.00001) this.Width -= diffW;
+					if (Math.Abs(diffW) > 0.00001 && this.Width - diffW > 0) this.Width -= diffW;
 				}
 				else if (this.previousDock == Dock.Left || this.previousDock == Dock.Right)
 				{
 					var diffH = this.previousBrowserSize.Value.Height - browserSize.Height;
-					if (Math.Abs(diffH) > 0.00001) this.Height -= diffH;
+					if (Math.Abs(diffH) > 0.00001 && this.Height - diffH > 0) this.Height -= diffH;
 				}
 			}
 			else