diff --git a/src/java/com/threerings/resource/JNLPDownloader.java b/src/java/com/threerings/resource/JNLPDownloader.java
index f39852cca..d12877896 100644
--- a/src/java/com/threerings/resource/JNLPDownloader.java
+++ b/src/java/com/threerings/resource/JNLPDownloader.java
@@ -1,5 +1,5 @@
 //
-// $Id: JNLPDownloader.java,v 1.10 2003/10/29 22:31:55 mdb Exp $
+// $Id: JNLPDownloader.java,v 1.11 2003/10/29 23:09:48 mdb Exp $
 
 package com.threerings.resource;
 
@@ -195,6 +195,16 @@ public class JNLPDownloader extends Downloader
             if (!_patchFile.delete()) {
                 Log.warning("Failed to delete patch file " + _curFile + ".");
             }
+
+            // delete any old unversioned version of the .jar file
+            File unverDest = new File(ResourceManager.unversionPath(
+                                          _desc.destFile.getPath(), ".jar"));
+            if (unverDest.exists()) {
+                if (!unverDest.delete()) {
+                    Log.warning("Failed to delete old unversioned bundle '" +
+                                unverDest + "'.");
+                }
+            }
         }
 
         PrintWriter pout = new PrintWriter(
diff --git a/src/java/com/threerings/resource/ResourceBundle.java b/src/java/com/threerings/resource/ResourceBundle.java
index 17becc6e7..a38c4e57c 100644
--- a/src/java/com/threerings/resource/ResourceBundle.java
+++ b/src/java/com/threerings/resource/ResourceBundle.java
@@ -1,5 +1,5 @@
 //
-// $Id: ResourceBundle.java,v 1.24 2003/10/22 18:50:27 mdb Exp $
+// $Id: ResourceBundle.java,v 1.25 2003/10/29 23:09:48 mdb Exp $
 
 package com.threerings.resource;
 
@@ -50,7 +50,9 @@ public class ResourceBundle
     {
         _source = source;
         if (unpack) {
-            String root = stripSuffix(source.getPath());
+            String root = ResourceManager.unversionPath(
+                source.getPath(), ".jar");
+            root = stripSuffix(root);
             _unpacked = new File(root + ".stamp");
             _cache = new File(root);
         }
diff --git a/src/java/com/threerings/resource/ResourceManager.java b/src/java/com/threerings/resource/ResourceManager.java
index 3e6b36416..f069eb5f5 100644
--- a/src/java/com/threerings/resource/ResourceManager.java
+++ b/src/java/com/threerings/resource/ResourceManager.java
@@ -1,5 +1,5 @@
 //
-// $Id: ResourceManager.java,v 1.38 2003/10/29 22:31:55 mdb Exp $
+// $Id: ResourceManager.java,v 1.39 2003/10/29 23:09:48 mdb Exp $
 
 package com.threerings.resource;
 
@@ -870,7 +870,7 @@ public class ResourceManager
         if (!suffix.startsWith(".")) {
             suffix = "." + suffix;
         }
-        int sidx = path.indexOf(suffix);
+        int sidx = path.lastIndexOf(suffix);
         if (sidx == -1) {
             Log.warning("Invalid unversioned path, missing suffix " +
                         "[path=" + path + ", suffix=" + suffix + "].");
@@ -879,6 +879,28 @@ public class ResourceManager
         return path.substring(0, sidx) + "__V" + version + suffix;
     }
 
+    /**
+     * Creates an unversioned version of the supplied path. If the path is
+     * not versioned, the existing path will be returned.
+     */
+    public static String unversionPath (String path, String suffix)
+    {
+        if (!suffix.startsWith(".")) {
+            suffix = "." + suffix;
+        }
+        int vidx = path.indexOf("__V");
+        if (vidx == -1) {
+            return path;
+        }
+        int sidx = path.lastIndexOf(suffix);
+        if (sidx == -1) {
+            Log.warning("Invalid versioned path, missing suffix " +
+                        "[path=" + path + ", suffix=" + suffix + "].");
+            return path;
+        }
+        return path.substring(0, vidx) + suffix;
+    }
+
     /**
      * Returns the suffix of the specified path, ie. <code>.jar</code> if
      * the path references a file that ends in <code>.jar</code>.