diff --git a/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Debugger.AddIn.csproj b/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Debugger.AddIn.csproj
index 98b28217fe..be68efe0ea 100644
--- a/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Debugger.AddIn.csproj
+++ b/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Debugger.AddIn.csproj
@@ -185,6 +185,7 @@
     <Compile Include="Src\Visualizers\Graph\Layout\Tree\DotFormatter.cs" />
     <Compile Include="Src\Visualizers\Graph\Layout\Tree\IdGenerator.cs" />
     <Compile Include="Src\Visualizers\Graph\Layout\Tree\LayoutDirection.cs" />
+    <Compile Include="Src\Visualizers\Graph\Layout\Tree\NeatoDoubleFormatter.cs" />
     <Compile Include="Src\Visualizers\Graph\Layout\Tree\NeatoEdgeRouter.cs" />
     <Compile Include="Src\Visualizers\Graph\Layout\Tree\NeatoPositionTransform.cs" />
     <Compile Include="Src\Visualizers\Graph\Layout\Tree\NeatoProcess.cs" />
diff --git a/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/BoxDotFormatter.cs b/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/BoxDotFormatter.cs
index 58b7e007c6..e374a7d3fa 100644
--- a/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/BoxDotFormatter.cs
+++ b/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/BoxDotFormatter.cs
@@ -27,7 +27,7 @@ namespace Debugger.AddIn.Visualizers.Graph.Layout
 			Rect neatoInput = transform.NodeToNeatoInput(node);
 			
 			string dotFormatNode =
-				string.Format(formatCulture,
+				string.Format(this.neatoDoubleFormatter,
 				              "{0} [pos=\"{1},{2}!\" width=\"{3}\" height=\"{4}\"];",
 				              nodeName, neatoInput.Location.X, neatoInput.Location.Y, neatoInput.Width, neatoInput.Height);
 			builder.AppendLine(dotFormatNode);
diff --git a/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/DotFormatter.cs b/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/DotFormatter.cs
index 3413bbf077..e2ba4e05db 100644
--- a/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/DotFormatter.cs
+++ b/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/DotFormatter.cs
@@ -23,12 +23,12 @@ namespace Debugger.AddIn.Visualizers.Graph.Layout
 		
 		protected NeatoPositionTransform transform;
 		
+		protected NeatoDoubleFormatter neatoDoubleFormatter = new NeatoDoubleFormatter();
+		
 		// state (node and edge names) needed for parsing back
 		protected Dictionary<PositionedNode, string> nodeNames = new Dictionary<PositionedNode, string>();
 		protected Dictionary<PositionedEdge, string> edgeNames = new Dictionary<PositionedEdge, string>();
 		
-		protected CultureInfo formatCulture = CultureInfo.GetCultureInfo("en-US");
-		
 		/// <summary>
 		/// Used for generating node and edge names.
 		/// </summary>
@@ -136,7 +136,7 @@ namespace Debugger.AddIn.Visualizers.Graph.Layout
 		
 		private double readDouble(TextReader reader)
 		{
-			return double.Parse(readWord(reader), formatCulture);
+			return double.Parse(readWord(reader), this.neatoDoubleFormatter.DoubleCulture);
 		}
 		
 		private int readInt(TextReader reader)
diff --git a/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/NeatoDoubleFormatter.cs b/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/NeatoDoubleFormatter.cs
new file mode 100644
index 0000000000..3628834ed9
--- /dev/null
+++ b/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/NeatoDoubleFormatter.cs
@@ -0,0 +1,39 @@
+// <file>
+//     <copyright see="prj:///doc/copyright.txt"/>
+//     <license see="prj:///doc/license.txt"/>
+//     <owner name="Martin Koníček" email="martin.konicek@gmail.com"/>
+//     <version>$Revision$</version>
+// </file>
+using System;
+using System.Globalization;
+
+namespace Debugger.AddIn.Visualizers.Graph.Layout
+{
+	/// <summary>
+	/// When used as IFormatProvider in string.Format, formats doubles to be suitable for Neato.
+	/// </summary>
+	public class NeatoDoubleFormatter : IFormatProvider, ICustomFormatter
+	{
+		private CultureInfo doubleCulture = CultureInfo.GetCultureInfo("en-US");
+		/// <summary>
+		/// CultureInfo used for formatting and parsing doubles (en-US).
+		/// </summary>
+		public CultureInfo DoubleCulture
+		{
+			get { return this.doubleCulture; }
+		}
+
+		public object GetFormat(Type formatType)
+		{
+			if (formatType == typeof(ICustomFormatter))
+				return this;
+			else
+				return null;
+		}
+
+		public string Format(string format, object arg, IFormatProvider formatProvider)
+		{
+			return string.Format(doubleCulture, "{0:0.000}", arg);
+		}
+	}
+}
diff --git a/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/RecordDotFormatter.cs b/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/RecordDotFormatter.cs
index d853abafee..fd83305b30 100644
--- a/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/RecordDotFormatter.cs
+++ b/src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Visualizers/Graph/Layout/Tree/RecordDotFormatter.cs
@@ -12,7 +12,7 @@ using System.Windows;
 namespace Debugger.AddIn.Visualizers.Graph.Layout
 {
 	/// <summary>
-	/// <see cref="DotFormatter"/> that treats nodes as records of properties. 
+	/// <see cref="DotFormatter"/> that treats nodes as records of properties.
 	/// Edges start at property, end at node.
 	/// </summary>
 	public class RecordDotFormatter : DotFormatter
@@ -48,9 +48,9 @@ namespace Debugger.AddIn.Visualizers.Graph.Layout
 			}
 			
 			string dotFormatNode =
-				string.Format(formatCulture,
+				string.Format(this.neatoDoubleFormatter,
 				              "{0} [pos=\"{1},{2}!\" width=\"{3}\" height=\"{4}\" label=\"{5}\"];",
-				              nodeName, 
+				              nodeName,
 				              neatoInput.Location.X, neatoInput.Location.Y, neatoInput.Width, neatoInput.Height,
 				              recordLabel.ToString());
 			builder.AppendLine(dotFormatNode);