diff --git a/source/de/anomic/kelondro/kelondroAbstractOrder.java b/source/de/anomic/kelondro/kelondroAbstractOrder.java
index e738da591..5c6da4020 100644
--- a/source/de/anomic/kelondro/kelondroAbstractOrder.java
+++ b/source/de/anomic/kelondro/kelondroAbstractOrder.java
@@ -47,15 +47,11 @@ package de.anomic.kelondro;
 
 import de.anomic.kelondro.kelondroRecords.Node;
 
-public abstract class kelondroAbstractOrder implements kelondroOrder, Cloneable {
+public abstract class kelondroAbstractOrder implements kelondroOrder {
 
     protected byte[] zero = null;
     
-    public Object clone() {
-        Object theClone = this.clone();
-        ((kelondroOrder) theClone).rotate(this.zero);
-        return theClone;
-    }
+    public abstract Object clone();
     
     public long partition(byte[] key, int forks) {
         final long d = (Long.MAX_VALUE / forks) + ((Long.MAX_VALUE % forks) + 1) / forks;
diff --git a/source/de/anomic/kelondro/kelondroBase64Order.java b/source/de/anomic/kelondro/kelondroBase64Order.java
index ae549b44d..fe3c80ba7 100644
--- a/source/de/anomic/kelondro/kelondroBase64Order.java
+++ b/source/de/anomic/kelondro/kelondroBase64Order.java
@@ -83,6 +83,12 @@ public class kelondroBase64Order extends kelondroAbstractOrder implements kelond
         ahpla = (rfc1113compliant) ? ahpla_standard : ahpla_enhanced;
     }
 
+    public Object clone() {
+        kelondroBase64Order o = new kelondroBase64Order(this.asc, this.rfc1113compliant);
+        o.rotate(this.zero);
+        return o;
+    }
+    
     public static kelondroOrder bySignature(String signature) {
         if (signature.equals("Bd")) return new kelondroBase64Order(false, false);
         if (signature.equals("bd")) return new kelondroBase64Order(false, true);
diff --git a/source/de/anomic/kelondro/kelondroNaturalOrder.java b/source/de/anomic/kelondro/kelondroNaturalOrder.java
index 097a54b20..5d92b80e5 100644
--- a/source/de/anomic/kelondro/kelondroNaturalOrder.java
+++ b/source/de/anomic/kelondro/kelondroNaturalOrder.java
@@ -47,7 +47,7 @@ package de.anomic.kelondro;
 
 import java.util.Comparator;
 
-public class kelondroNaturalOrder extends kelondroAbstractOrder implements kelondroOrder, Comparator {
+public class kelondroNaturalOrder extends kelondroAbstractOrder implements kelondroOrder, Comparator, Cloneable {
     
     boolean asc;
     
@@ -55,6 +55,13 @@ public class kelondroNaturalOrder extends kelondroAbstractOrder implements kelon
     
     public kelondroNaturalOrder(boolean ascending) {
         this.asc = ascending;
+        this.zero = null;
+    }
+    
+    public Object clone() {
+        kelondroNaturalOrder o = new kelondroNaturalOrder(this.asc);
+        o.rotate(this.zero);
+        return o;
     }
     
     public static kelondroOrder bySignature(String signature) {
diff --git a/source/de/anomic/plasma/plasmaWordIndex.java b/source/de/anomic/plasma/plasmaWordIndex.java
index 7ea5b24a3..8a615616b 100644
--- a/source/de/anomic/plasma/plasmaWordIndex.java
+++ b/source/de/anomic/plasma/plasmaWordIndex.java
@@ -384,9 +384,9 @@ public final class plasmaWordIndex {
     public static final int RL_WORDFILES   = 3;
     
     public synchronized TreeSet wordHashes(String startHash, int resourceLevel, boolean rot, int count) {
-        //kelondroOrder hashOrder = (kelondroOrder) indexOrder.clone();
-        //if (rot) hashOrder.rotate(startHash.getBytes()); else hashOrder.rotate(null);
-        TreeSet hashes = new TreeSet(/*hashOrder*/);
+        kelondroOrder hashOrder = (kelondroOrder) indexOrder.clone();
+        if (rot) hashOrder.rotate(startHash.getBytes()); else hashOrder.rotate(null);
+        TreeSet hashes = new TreeSet(hashOrder);
         Iterator i = wordHashes(startHash, resourceLevel, rot);
         String hash;
         while ((hashes.size() < count) && (i.hasNext())) {
diff --git a/source/de/anomic/plasma/plasmaWordIndexCache.java b/source/de/anomic/plasma/plasmaWordIndexCache.java
index 84e6eb3de..a3d75a09d 100644
--- a/source/de/anomic/plasma/plasmaWordIndexCache.java
+++ b/source/de/anomic/plasma/plasmaWordIndexCache.java
@@ -61,8 +61,8 @@ public final class plasmaWordIndexCache implements plasmaWordIndexInterface {
     // environment constants
     private static final String indexArrayFileName = "indexDump1.array";
     public static final int  wCacheReferenceLimit = 50;
-    public static final long wCacheMaxAge         = 1000 * 60 * 60 * 2; // milliseconds; 2 hours
-    public static final long kCacheMaxAge         = 1000 * 60 * 2;      // milliseconds; 2 minutes
+    public static final long wCacheMaxAge         = 1000 * 60 * 30; // milliseconds; 30 minutes
+    public static final long kCacheMaxAge         = 1000 * 60 * 2;  // milliseconds; 2 minutes
     
     // class variables
     private final File databaseRoot;
@@ -393,35 +393,6 @@ public final class plasmaWordIndexCache implements plasmaWordIndexInterface {
         }
         return count;
     }
-
-    /*
-    public int tryRemoveURLs(String urlHash) {
-        // this tries to delete an index from the cache that has this
-        // urlHash assigned. This can only work if the entry is really fresh
-        // Such entries must be searched in the latest entries
-        int delCount = 0;
-        synchronized (wCache) {
-            Iterator i = hashDate.scores(false);
-            String wordHash;
-            long t;
-            plasmaWordIndexEntryContainer c;
-            while (i.hasNext()) {
-                wordHash = (String) i.next();
-                // check time
-                t = longEmit(hashDate.getScore(wordHash));
-                if (System.currentTimeMillis() - t > wCacheMinAge) return delCount;
-                // get container
-                c = (plasmaWordIndexEntryContainer) wCache.get(wordHash);
-                if (c.remove(urlHash) != null) {
-                    wCache.put(wordHash, c);
-                    hashScore.decScore(wordHash);
-                    delCount++;
-                }
-            }
-        }
-        return delCount;
-    }
-    */
     
     public int tryRemoveURLs(String urlHash) {
         // this tries to delete an index from the cache that has this