diff --git a/source/de/anomic/plasma/plasmaCrawlLURL.java b/source/de/anomic/plasma/plasmaCrawlLURL.java
index 1d482122c..63c042843 100644
--- a/source/de/anomic/plasma/plasmaCrawlLURL.java
+++ b/source/de/anomic/plasma/plasmaCrawlLURL.java
@@ -421,6 +421,7 @@ public final class plasmaCrawlLURL extends plasmaURL {
         // - int: # of outlinks to same domain
         // - int: # of outlinks to outside domain
         // - ETag: for re-crawl decision upon HEAD request
+        // - int: # of keywords
         
         public Entry(URL url, String descr, Date moddate, Date loaddate, String referrerHash, int copyCount, boolean localNeed, int quality, String language, char doctype, int size, int wordCount) {
             // create new entry and store it into database
diff --git a/source/de/anomic/plasma/plasmaCrawlProfile.java b/source/de/anomic/plasma/plasmaCrawlProfile.java
index e4e7108f9..236073cf8 100644
--- a/source/de/anomic/plasma/plasmaCrawlProfile.java
+++ b/source/de/anomic/plasma/plasmaCrawlProfile.java
@@ -403,35 +403,42 @@ public class plasmaCrawlProfile {
             profileTable.set(handle(), mem);
         }
         public void domInc(String domain, String referrer, int depth) {
-            DomProfile dp = (DomProfile) doms.get(domain);
-            if (dp == null) {
-                // new domain
-                doms.put(domain, new DomProfile(referrer, depth));
-            } else {
-                // increase counter
-                dp.inc();
-                doms.put(domain, dp);
+            synchronized (domain.intern()) {
+                DomProfile dp = (DomProfile) doms.get(domain);
+                if (dp == null) {
+                    // new domain
+                    doms.put(domain, new DomProfile(referrer, depth));
+                } else {
+                    // increase counter
+                    dp.inc();
+                    doms.put(domain, dp);
+                }
             }
             domsCache.put(this.mem.get("handle"), doms);
         }
         public boolean grantedDomAppearance(String domain) {
             int max = domFilterDepth();
             if (max == Integer.MAX_VALUE) return true;
-            DomProfile dp = (DomProfile) doms.get(domain);
-            if (dp == null) {
-                return 0 < max;
-            } else {
-                return dp.depth < max;
+            synchronized (domain.intern()) {
+                DomProfile dp = (DomProfile) doms.get(domain);
+                if (dp == null) {
+                    return 0 < max;
+                } else {
+                    return dp.depth < max;
+                }
             }
         }
+
         public boolean grantedDomCount(String domain) {
             int max = domMaxPages();
             if (max == Integer.MAX_VALUE) return true;
-            DomProfile dp = (DomProfile) doms.get(domain);
-            if (dp == null) {
-                return 0 < max;
-            } else {
-                return dp.count < max;
+            synchronized (domain.intern()) {
+                DomProfile dp = (DomProfile) doms.get(domain);
+                if (dp == null) {
+                    return 0 < max;
+                } else {
+                    return dp.count < max;
+                }
             }
         }
         public int domSize() {
diff --git a/source/de/anomic/plasma/plasmaWordIndexEntry.java b/source/de/anomic/plasma/plasmaWordIndexEntry.java
index b99b3780d..60c49b677 100644
--- a/source/de/anomic/plasma/plasmaWordIndexEntry.java
+++ b/source/de/anomic/plasma/plasmaWordIndexEntry.java
@@ -241,7 +241,6 @@ public final class plasmaWordIndexEntry implements Cloneable {
         // more needed attributes:
         // - boolean: appearance attributes: title, appears in header, anchor-descr, image-tag etc
         // - boolean: URL attributes
-        // - int: # of keywords
         
     if ((language == null) || (language.length() != plasmaURL.urlLanguageLength)) language = "uk";
         this.urlHash = urlHash;