diff --git a/dev/core/src/com/google/gwt/dev/shell/CheckForUpdates.java b/dev/core/src/com/google/gwt/dev/shell/CheckForUpdates.java
index 67a65b4..5ac6c00 100644
--- a/dev/core/src/com/google/gwt/dev/shell/CheckForUpdates.java
+++ b/dev/core/src/com/google/gwt/dev/shell/CheckForUpdates.java
@@ -19,7 +19,6 @@
 import com.google.gwt.core.ext.TreeLogger.HelpInfo;
 import com.google.gwt.dev.About;
 import com.google.gwt.dev.GwtVersion;
-import com.google.gwt.dev.shell.ie.CheckForUpdatesIE6;
 
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
@@ -40,7 +39,6 @@
 import java.net.URL;
 import java.net.URLConnection;
 import java.util.Date;
-import java.util.Locale;
 import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.FutureTask;
@@ -56,7 +54,7 @@
  * Orchestrates a best-effort attempt to find out if a new version of GWT is
  * available.
  */
-public class CheckForUpdates {
+public final class CheckForUpdates {
 
   /**
    * Returns the result of an update check.
@@ -78,7 +76,6 @@
 
   // System properties used by CheckForUpdates
   protected static final String PROPERTY_DEBUG_HTTP_GET = "gwt.debugLowLevelHttpGet";
-  protected static final String PROPERTY_FORCE_NONNATIVE = "gwt.forceVersionCheckNonNative";
   protected static final String PROPERTY_PREFS_NAME = "gwt.prefsPathName";
   protected static final String PROPERTY_QUERY_URL = "gwt.forceVersionCheckURL";
 
@@ -158,12 +155,7 @@
 
   public static CheckForUpdates createUpdateChecker(TreeLogger logger,
       String entryPoint) {
-    // Windows has a custom implementation to handle proxies.
-    if (System.getProperty("os.name").toLowerCase(Locale.ROOT).contains("win")) {
-      return new CheckForUpdatesIE6(logger, entryPoint);
-    } else {
-      return new CheckForUpdates(logger, entryPoint);
-    }
+    return new CheckForUpdates(logger, entryPoint);
   }
 
   public static void logUpdateAvailable(TreeLogger logger,
@@ -312,7 +304,7 @@
       // See if new version is available.
       //
       String url = queryURL + "?v=" + myVersion.toString() + "&id="
-          + firstLaunch + "&r=" + About.getGwtSvnRev();
+          + firstLaunch + "&r=" + About.getGwtGitRev();
       if (entryPoint != null) {
         url += "&e=" + entryPoint;
       }
@@ -321,17 +313,8 @@
 
       // Do the HTTP GET.
       //
-      byte[] response;
       String fullUserAgent = makeUserAgent();
-      if (System.getProperty(PROPERTY_FORCE_NONNATIVE) == null) {
-        // Use subclass.
-        //
-        response = doHttpGet(branch, fullUserAgent, url);
-      } else {
-        // Use the pure Java version, but it probably doesn't work with proxies.
-        //
-        response = httpGetNonNative(branch, fullUserAgent, url);
-      }
+      byte[] response = doHttpGet(branch, fullUserAgent, url);
 
       if (response == null || response.length == 0) {
         // Problem. Quietly fail.
@@ -354,32 +337,7 @@
     return null;
   }
 
-  /**
-   * Default implementation just uses the platform-independent method. A
-   * subclass should override this method for platform-dependent proxy handling,
-   * for example.
-   *
-   * @param branch TreeLogger to use
-   * @param userAgent user agent string to send in request
-   * @param url URL to fetch
-   * @return byte array of response, or null if an error
-   */
-  protected byte[] doHttpGet(TreeLogger branch, String userAgent, String url) {
-    return httpGetNonNative(branch, userAgent, url);
-  }
-
-  /**
-   * This default implementation uses regular Java HTTP, which doesn't deal with
-   * proxies automagically. See the IE6 subclasses for an implementation that
-   * does deal with proxies.
-   *
-   * @param branch TreeLogger to use
-   * @param userAgent user agent string to send in request
-   * @param url URL to fetch
-   * @return byte array of response, or null if an error
-   */
-  protected byte[] httpGetNonNative(TreeLogger branch, String userAgent,
-      String url) {
+  private byte[] doHttpGet(TreeLogger branch, String userAgent, String url) {
     Throwable caught;
     InputStream is = null;
     try {
diff --git a/dev/core/src/com/google/gwt/dev/shell/ie/CheckForUpdatesIE6.java b/dev/core/src/com/google/gwt/dev/shell/ie/CheckForUpdatesIE6.java
deleted file mode 100644
index cf6fe14..0000000
--- a/dev/core/src/com/google/gwt/dev/shell/ie/CheckForUpdatesIE6.java
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright 2007 Google Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
-package com.google.gwt.dev.shell.ie;
-
-import com.google.gwt.core.ext.TreeLogger;
-import com.google.gwt.dev.shell.CheckForUpdates;
-
-/**
- * IE6 implementation of the update checker.
- */
-public class CheckForUpdatesIE6 extends CheckForUpdates {
-
-  public CheckForUpdatesIE6(TreeLogger logger, String entryPoint) {
-    super(logger, entryPoint);
-  }
-
-  @Override
-  protected byte[] doHttpGet(TreeLogger branch, String userAgent, String url) {
-    if (LowLevelIE6.init()) {
-      return LowLevelIE6.httpGet(branch, userAgent, url,
-          System.getProperty(PROPERTY_DEBUG_HTTP_GET) != null);
-    } else {
-      return super.doHttpGet(branch, userAgent, url);
-    }
-  }
-
-}
diff --git a/dev/core/src/com/google/gwt/dev/shell/ie/LowLevelIE6.java b/dev/core/src/com/google/gwt/dev/shell/ie/LowLevelIE6.java
deleted file mode 100644
index bd1d8e4..0000000
--- a/dev/core/src/com/google/gwt/dev/shell/ie/LowLevelIE6.java
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * Copyright 2006 Google Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
-package com.google.gwt.dev.shell.ie;
-
-import com.google.gwt.core.ext.TreeLogger;
-import com.google.gwt.util.tools.Utility;
-
-import java.io.File;
-import java.io.IOException;
-
-/**
- * Various low-level helper methods for dealing with COM and such.
- */
-class LowLevelIE6 {
-
-  private static boolean sInitialized = false;
-
-  /**
-   * Does an HTTP GET that works with Windows proxy settings. Set the system
-   * property <code>gwt.debugLowLevelHttpGet</code> to print failure status
-   * codes to stderr.
-   *
-   * @param userAgent the user-agent to specify for the GET
-   * @param url the absolute URL to GET
-   * @return the bytes of the full response (including headers), or
-   *         <code>null</code> if there's a problem
-   */
-  public static byte[] httpGet(TreeLogger branch, String userAgent, String url,
-      boolean debugFlag) {
-    if (!init()) {
-      return null;
-    }
-    byte[][] out = new byte[1][];
-    int status = _httpGet(userAgent, url, out);
-    if (status == 0) {
-      return out[0];
-    } else {
-      if (debugFlag) {
-        branch.log(TreeLogger.ERROR, "GET failed with status " + status
-            + " for " + url);
-      }
-      return null;
-    }
-  }
-
-  public static synchronized boolean init() {
-    if (!sInitialized) {
-      File lib = new File(Utility.getInstallPath(), "gwt-ll.dll");
-      if (!lib.exists()) {
-        return false;
-      }
-      try {
-        // Try to make canonical.
-        System.load(lib.getCanonicalPath());
-      } catch (IOException e) {
-        return false;
-      } catch (UnsatisfiedLinkError e) {
-        return false;
-      }
-      sInitialized = true;
-    }
-    return true;
-  }
-
-  // CHECKSTYLE_OFF
-  // out must be an array of size 1 to receive the array answer
-  private static native int _httpGet(String userAgent, String url, byte[][] out);
-
-  // CHECKSTYLE_ON
-
-  /**
-   * Not instantiable.
-   */
-  private LowLevelIE6() {
-  }
-}