diff --git a/htroot/ConfigNetwork_p.java b/htroot/ConfigNetwork_p.java
index 29e2ee920..5b14e1e46 100644
--- a/htroot/ConfigNetwork_p.java
+++ b/htroot/ConfigNetwork_p.java
@@ -207,7 +207,10 @@ public class ConfigNetwork_p {
         prop.put("robinson.checked", (indexDistribute || indexReceive) ? "0" : "1");
         prop.putHTML("cluster.peers.ipport", sb.getConfig("cluster.peers.ipport", ""));
         prop.putHTML("cluster.peers.yacydomain", sb.getConfig("cluster.peers.yacydomain", ""));
-        prop.put("cluster.peers.yacydomain.hashes", (sb.clusterhashes.size() == 0) ? "" : sb.clusterhashes.toString());
+        String hashes = "";
+        for (byte[] h:sb.clusterhashes.keySet()) hashes += ", " + new String(h);
+        if (hashes.length() > 2) hashes = hashes.substring(2);
+        prop.put("cluster.peers.yacydomain.hashes", hashes);
         
         // set p2p mode flags
         prop.put("privatepeerChecked", (sb.getConfig("cluster.mode", "").equals("privatepeer")) ? "1" : "0");
diff --git a/source/de/anomic/plasma/plasmaSwitchboard.java b/source/de/anomic/plasma/plasmaSwitchboard.java
index 95f704c52..2e20e609b 100644
--- a/source/de/anomic/plasma/plasmaSwitchboard.java
+++ b/source/de/anomic/plasma/plasmaSwitchboard.java
@@ -924,7 +924,7 @@ public final class plasmaSwitchboard extends serverAbstractSwitch<IndexingStack.
             return network.indexOf(peer) >= 0;
     	} else if (clustermode.equals(plasmaSwitchboardConstants.CLUSTER_MODE_PUBLIC_CLUSTER)) {
     		// check if we got the request from a peer in the public cluster
-            return this.clusterhashes.containsKey(peer);
+            return this.clusterhashes.containsKey(peer.getBytes());
     	} else {
     		return false;
     	}
@@ -942,7 +942,7 @@ public final class plasmaSwitchboard extends serverAbstractSwitch<IndexingStack.
             return network.indexOf(seed.getPublicAddress()) >= 0;
     	} else if (clustermode.equals(plasmaSwitchboardConstants.CLUSTER_MODE_PUBLIC_CLUSTER)) {
     	    // check if we got the request from a peer in the public cluster
-            return this.clusterhashes.containsKey(seed.hash);
+            return this.clusterhashes.containsKey(seed.hash.getBytes());
     	} else {
     		return false;
     	}
diff --git a/source/de/anomic/yacy/yacyCore.java b/source/de/anomic/yacy/yacyCore.java
index c827df363..5fcb10d82 100644
--- a/source/de/anomic/yacy/yacyCore.java
+++ b/source/de/anomic/yacy/yacyCore.java
@@ -310,19 +310,19 @@ public class yacyCore {
                 // add also all peers from cluster if this is a public robinson cluster
                 if (ch != null) {
                     final Iterator<Map.Entry<byte[], String>> i = ch.entrySet().iterator();
-                    byte[] hash;
+                    String hash;
                     Map.Entry<byte[], String> entry;
                     yacySeed seed;
                     while (i.hasNext()) {
                         entry = i.next();
-                        hash = entry.getKey();
+                        hash = new String(entry.getKey());
                         seed = seeds.get(hash);
                         if (seed == null) {
-                            seed = sb.webIndex.peers().get(new String(hash));
+                            seed = sb.webIndex.peers().get(hash);
                             if (seed == null) continue;
                         }
                         seed.setAlternativeAddress(entry.getValue());
-                        seeds.put(new String(hash), seed);
+                        seeds.put(hash, seed);
                 	}
                 }
             } else {