Index: Util/SystemInfo.cs
===================================================================
--- Util/SystemInfo.cs	(revision 499049)
+++ Util/SystemInfo.cs	(working copy)
@@ -882,6 +882,9 @@
 				throw new ArgumentNullException("path");
 			}
 
+            // Expand Environment variables
+            path = Environment.ExpandEnvironmentVariables(path);
+
 			string baseDirectory = "";
 			try
 			{