diff --git a/source/de/anomic/kelondro/kelondroRow.java b/source/de/anomic/kelondro/kelondroRow.java
index e302c046d..b00f3755c 100644
--- a/source/de/anomic/kelondro/kelondroRow.java
+++ b/source/de/anomic/kelondro/kelondroRow.java
@@ -162,7 +162,7 @@ public class kelondroRow {
         }
         
         public Entry(byte[] rowinstance, int start, int length) {
-            assert objectsize == length;
+            assert objectsize == length : "objectsize = " + objectsize + ", length = " + length;
             this.rowinstance = new byte[objectsize];
             int ll = Math.min(objectsize, length);
             System.arraycopy(rowinstance, start, this.rowinstance, 0, ll);
diff --git a/source/de/anomic/kelondro/kelondroRowSet.java b/source/de/anomic/kelondro/kelondroRowSet.java
index 9d52cd315..f7b3f0128 100644
--- a/source/de/anomic/kelondro/kelondroRowSet.java
+++ b/source/de/anomic/kelondro/kelondroRowSet.java
@@ -190,7 +190,7 @@ public class kelondroRowSet extends kelondroRowCollection implements kelondroInd
         Integer nxt = (Integer) removeMarker.firstKey();
         removeMarker.remove(nxt);
         int idx = nxt.intValue();
-        assert (idx < sortBound);
+        assert (idx < sortBound) : "idx = " + idx + ", sortBound = " + sortBound;
         int d = 1;
         byte[] a;
         while (removeMarker.size() > 0) {
diff --git a/source/de/anomic/plasma/plasmaSearchEvent.java b/source/de/anomic/plasma/plasmaSearchEvent.java
index 8043bc0bd..1d0c45ec3 100644
--- a/source/de/anomic/plasma/plasmaSearchEvent.java
+++ b/source/de/anomic/plasma/plasmaSearchEvent.java
@@ -395,7 +395,18 @@ public final class plasmaSearchEvent extends Thread implements Runnable {
                 // find the url entry
                 page = urlStore.load(entry.urlHash(), entry);
                 // add a result
-                if (page != null) acc.addResult(page, preranking);
+                if (page != null) {
+                    if ((!(query.constraint.equals(plasmaSearchQuery.catchall_constraint))) &&
+                        (query.constraint.get(plasmaCondenser.flag_cat_indexof)) &&
+                        (!(page.comp().descr().startsWith("Index of")))) {
+                        log.logFine("filtered out " + page.comp().url().toString());
+                        // filter out bad results
+                        Iterator wi = query.queryHashes.iterator();
+                        while (wi.hasNext()) wordIndex.removeEntry((String) wi.next(), page.hash(), true);
+                    } else {
+                        acc.addResult(page, preranking);
+                    }
+                }
             }
         } catch (kelondroException ee) {
             serverLog.logSevere("PLASMA", "Database Failure during plasmaSearch.order: " + ee.getMessage(), ee);