diff --git a/build.properties b/build.properties
index 1278199c4..a0344e219 100644
--- a/build.properties
+++ b/build.properties
@@ -3,7 +3,7 @@ javacSource=1.5
 javacTarget=1.5
 
 # Release Configuration
-releaseVersion=0.585
+releaseVersion=0.586
 stdReleaseFile=yacy_v${releaseVersion}_${DSTAMP}_${releaseNr}.tar.gz
 embReleaseFile=yacy_emb_v${releaseVersion}_${DSTAMP}_${releaseNr}.tar.gz
 proReleaseFile=yacy_pro_v${releaseVersion}_${DSTAMP}_${releaseNr}.tar.gz
diff --git a/htroot/js/WatchCrawler.js b/htroot/js/WatchCrawler.js
index 96f9d4691..3f205c025 100644
--- a/htroot/js/WatchCrawler.js
+++ b/htroot/js/WatchCrawler.js
@@ -72,7 +72,7 @@ function handleStatus(){
 	
 	var ppmSpan = document.getElementById("ppmSpan");
 	removeAllChildren(ppmSpan);
-	for(i=0;i<ppm;i++){
+	for(i = 0; i < ppm / 10; i++){
 		img=document.createElement("img");
 		img.setAttribute("src", BAR_IMG1);
 		ppmSpan.appendChild(img);
diff --git a/htroot/yacy/hello.java b/htroot/yacy/hello.java
index 2392600fb..23fa37a0b 100644
--- a/htroot/yacy/hello.java
+++ b/htroot/yacy/hello.java
@@ -210,11 +210,15 @@ public final class hello {
                 seeds.ensureCapacity((ySeeds.size() + 1) * 768);
                 Iterator<yacySeed> si = ySeeds.values().iterator();
                 yacySeed s;
+                String seedString;
                 while (si.hasNext()) {
                 	s = si.next();
                     if ((s != null) && (s.isProper() == null)) try {
-                        seeds.append("seed").append(count).append('=').append(s.genSeedStr(key)).append(serverCore.CRLF_STRING);
-                        count++;
+                        seedString = s.genSeedStr(key);
+                        if (seedString != null) {
+                            seeds.append("seed").append(count).append('=').append(seedString).append(serverCore.CRLF_STRING);
+                            count++;
+                        }
                     } catch (ConcurrentModificationException e) {
                         e.printStackTrace();
                     }
diff --git a/source/de/anomic/server/serverCodings.java b/source/de/anomic/server/serverCodings.java
index a6320b045..db704a7aa 100644
--- a/source/de/anomic/server/serverCodings.java
+++ b/source/de/anomic/server/serverCodings.java
@@ -51,6 +51,7 @@ import java.io.FileInputStream;
 import java.io.InputStream;
 import java.security.MessageDigest;
 import java.util.Collections;
+import java.util.ConcurrentModificationException;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
@@ -199,10 +200,21 @@ public final class serverCodings {
         synchronized (m) {
             final StringBuffer buf = new StringBuffer(20 * m.size());
             if (braces) { buf.append("{"); }
-            for (Entry<String, String> e: m.entrySet()) {
-                buf.append(e.getKey()).append('=');
-                if (e.getValue() != null) { buf.append(e.getValue()); }
-                buf.append(separator);
+            int retry = 10;
+            critical: while (retry > 0) {
+                try {
+                    for (Entry<String, String> e: m.entrySet()) {
+                        buf.append(e.getKey()).append('=');
+                        if (e.getValue() != null) { buf.append(e.getValue()); }
+                        buf.append(separator);
+                    }
+                    break critical; // success
+                } catch (ConcurrentModificationException e) {
+                    // retry
+                    buf.setLength(1);
+                    retry--;
+                }
+                buf.setLength(1); // fail
             }
             if (buf.length() > 1) { buf.setLength(buf.length() - 1); } // remove last separator
             if (braces) { buf.append("}"); }