diff -r e34db561b7b9 netx/net/sourceforge/jnlp/cache/ResourceTracker.java
--- a/netx/net/sourceforge/jnlp/cache/ResourceTracker.java	Mon Apr 29 16:24:37 2013 +0200
+++ b/netx/net/sourceforge/jnlp/cache/ResourceTracker.java	Mon Apr 29 17:57:32 2013 +0200
@@ -49,6 +49,7 @@
 import net.sourceforge.jnlp.event.DownloadEvent;
 import net.sourceforge.jnlp.event.DownloadListener;
 import net.sourceforge.jnlp.runtime.JNLPRuntime;
+import net.sourceforge.jnlp.util.HttpUtils;
 import net.sourceforge.jnlp.util.StreamUtils;
 import net.sourceforge.jnlp.util.UrlUtils;
 import net.sourceforge.jnlp.util.WeakList;
@@ -874,7 +875,7 @@
 
             /* Fully consuming current request helps with connection re-use 
              * See http://docs.oracle.com/javase/1.5.0/docs/guide/net/http-keepalive.html */
-            StreamUtils.consumeAndCloseInputStream(httpConnection.getInputStream());
+            HttpUtils.consumeAndCloseConnectionSilently(httpConnection);
 
             return responseCode;
         }
@@ -910,7 +911,7 @@
 
                 int responseCode = getUrlResponseCode(url, requestProperties, "HEAD");
 
-                if (responseCode == HttpURLConnection.HTTP_NOT_IMPLEMENTED ) {
+                if (responseCode < 200 || responseCode >= 300) {
                     System.err.println("NOTE: The server does not appear to support HEAD requests, falling back to GET requests.");
                     /* Fallback: use GET request in the rare case the server does not support HEAD requests */
                     responseCode = getUrlResponseCode(url, requestProperties, "GET");
diff -r e34db561b7b9 netx/net/sourceforge/jnlp/util/HttpUtils.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netx/net/sourceforge/jnlp/util/HttpUtils.java	Mon Apr 29 17:57:32 2013 +0200
@@ -0,0 +1,64 @@
+/* 
+   Copyright (C) 2011 Red Hat, Inc.
+
+This file is part of IcedTea.
+
+IcedTea is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License as published by
+the Free Software Foundation, version 2.
+
+IcedTea is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with IcedTea; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version.
+*/
+package net.sourceforge.jnlp.util;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+
+
+public class HttpUtils {
+ 
+    
+      /**
+     * Ensure a HttpURLConnection is fully read, required for correct behaviour in some
+     * APIs, namely HttpURLConnection.
+     */
+    public static void consumeAndCloseConnectionSilently(HttpURLConnection c)  {
+        try {
+            InputStream in = c.getInputStream();
+            byte[] throwAwayBuffer = new byte[256];
+            while (in.read(throwAwayBuffer) > 0) {
+                /* ignore contents */
+            }
+            in.close();
+        } catch (IOException ex) {
+            ex.printStackTrace(System.err);
+        }
+    }
+    
+}
diff -r e34db561b7b9 netx/net/sourceforge/jnlp/util/StreamUtils.java
--- a/netx/net/sourceforge/jnlp/util/StreamUtils.java	Mon Apr 29 16:24:37 2013 +0200
+++ b/netx/net/sourceforge/jnlp/util/StreamUtils.java	Mon Apr 29 17:57:32 2013 +0200
@@ -42,22 +42,10 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
 
 public class StreamUtils {
 
-    /**
-     * Ensure a stream is fully read, required for correct behaviour in some
-     * APIs, namely HttpURLConnection.
-     * @throws IOException 
-     */
-    public static void consumeAndCloseInputStream(InputStream in) throws IOException {
-        byte[] throwAwayBuffer = new byte[256];
-        while (in.read(throwAwayBuffer) > 0) {
-            /* ignore contents */
-        }
-        in.close();
-    }
-
     /***
      * Closes a stream, without throwing IOException.
      * In case of IOException, prints the stack trace to System.err.