diff --git a/doc/Download.html b/doc/Download.html
index 7290383b5..1ab31c01c 100644
--- a/doc/Download.html
+++ b/doc/Download.html
@@ -65,14 +65,14 @@ You can <a href="http://java.sun.com/j2se/1.4.2/download.html">download the Java
 </p>
 
 <p><b>Latest Release:</b>
-The latest YaCy release version is 0.40<br>
+The latest YaCy release version is 0.41<br>
 Nightly builds from compiles out of SVN can be obtained from <a href="http://devbin.yacy-forum.de/">http://devbin.yacy-forum.de/</a>.<br>
 <p>Main releases of YaCy are hosted on <a href="http://www.yacy.net/yacy/">yacy.net</a>, <a href="http://developer.berlios.de/projects/yacy/">yacy@BerliOS.de</a> and <a href="http://freshmeat.net/projects/yacyproxy/">yacy@freshmeat.net</a>.<br>
 Download Mirrors and YaCy Flavours:
 <ul>
   <li>Generic release of YaCy (all platforms with J2SE 1.4.2: Linux, Mac OS X, Windows, Solaris):</li>
   <ul>
-    <li><tt>from yacy.net&nbsp;&nbsp;&nbsp;: <a href="http://www.yacy.net/yacy/release/yacy_v0.40_20050816_547.tar.gz"><tt>yacy_v0.40_20050816_547.tar.gz</tt></a></tt></li>
+    <li><tt>from yacy.net&nbsp;&nbsp;&nbsp;: <a href="http://www.yacy.net/yacy/release/yacy_v0.41_20051004_848.tar.gz"><tt>yacy_v0.41_20051004_848.tar.gz</tt></a></tt></li>
     <li><tt>from BerliOS.de&nbsp;: <a href="http://download.berlios.de/yacy/yacy_v0.40_20050816_547.tar.gz"><tt>yacy_v0.40_20050816_547.tar.gz</tt></a></tt></li>
   </ul>
   <li>Windows-flavour release of YaCy (same code as generic release, but with convenient Windows-Installer):</li>
diff --git a/source/de/anomic/kelondro/kelondroRecords.java b/source/de/anomic/kelondro/kelondroRecords.java
index 875c05009..e21ebcd3c 100644
--- a/source/de/anomic/kelondro/kelondroRecords.java
+++ b/source/de/anomic/kelondro/kelondroRecords.java
@@ -134,16 +134,16 @@ public class kelondroRecords {
     private   Handle            FREEH;       // pointer to first element in list of free Nodes, empty = NUL
     private   short             OHBYTEC;     // number of extra bytes in each node
     private   short             OHHANDLEC;   // number of handles in each node
-    private   int               COLWIDTHS[]; // array with widths of columns
+    protected int               COLWIDTHS[]; // array with widths of columns
     private   Handle            HANDLES[];   // array with handles
     private   byte[]            TXTPROPS[];  // array with text properties
     private   int               TXTPROPW;    // size of a single TXTPROPS element
 
     // caching buffer
-    private HashMap[]             XcacheHeaders; // the cache; holds overhead values and key element
-    private int                   XcacheSize;    // number of cache records
-    private long                  XcacheStartup; // startup time; for cache aging
-    private kelondroMScoreCluster cacheScore;   // controls cache aging
+    protected HashMap[]             XcacheHeaders; // the cache; holds overhead values and key element
+    protected int                   XcacheSize;    // number of cache records
+    protected long                  XcacheStartup; // startup time; for cache aging
+    protected kelondroMScoreCluster cacheScore;   // controls cache aging
 
 
     public kelondroRecords(File file, long buffersize /* bytes */,
@@ -345,7 +345,7 @@ public class kelondroRecords {
         return new File(filename);
     }
     
-    private int cacheChunkSize(boolean cacheControl) {
+    protected int cacheChunkSize(boolean cacheControl) {
         return this.headchunksize + element_in_cache + ((cacheControl) ? cache_control_entry : 0);
     }
     
diff --git a/source/de/anomic/kelondro/kelondroStack.java b/source/de/anomic/kelondro/kelondroStack.java
index 67cd98bc7..ac8e8b74e 100644
--- a/source/de/anomic/kelondro/kelondroStack.java
+++ b/source/de/anomic/kelondro/kelondroStack.java
@@ -91,6 +91,20 @@ public class kelondroStack extends kelondroRecords {
 	setHandle(toor, null); // reset the toor value
     }
 
+    public static kelondroStack reset(kelondroStack stack) throws IOException {
+        // memorize settings to this file
+        File f = new File(stack.filename);
+        long bz = stack.XcacheSize * stack.cacheChunkSize(true);
+        int[] cols = stack.COLWIDTHS;
+        
+        // close and delete the file
+        try {stack.close();} catch (Exception e) {};
+        if (f.exists()) f.delete();
+
+        // re-open a database with same settings as before
+        return new kelondroStack(f, bz, cols);
+    }
+    
     public class Counter implements Iterator {
 	Handle nextHandle = null;
 	public Counter() throws IOException {
diff --git a/source/de/anomic/plasma/plasmaCrawlBalancer.java b/source/de/anomic/plasma/plasmaCrawlBalancer.java
index 7dbbac71d..9d478745f 100644
--- a/source/de/anomic/plasma/plasmaCrawlBalancer.java
+++ b/source/de/anomic/plasma/plasmaCrawlBalancer.java
@@ -70,6 +70,11 @@ public class plasmaCrawlBalancer {
         stack = null;
     }
     
+    public void reset() throws IOException {
+        stack = kelondroStack.reset(stack);
+        domainStacks = new HashMap();
+    }
+    
     public Iterator iterator() {
         // iterates byte[] - objects
         return new KeyIterator(stack.iterator());
diff --git a/source/de/anomic/plasma/plasmaCrawlNURL.java b/source/de/anomic/plasma/plasmaCrawlNURL.java
index 12bbb7451..4c98aa24c 100644
--- a/source/de/anomic/plasma/plasmaCrawlNURL.java
+++ b/source/de/anomic/plasma/plasmaCrawlNURL.java
@@ -146,21 +146,13 @@ public class plasmaCrawlNURL extends plasmaURL {
         public void run() {
             Iterator i;
             try {
-                //System.out.println("init     coreStack index");
-                i =     coreStack.iterator(); while (i.hasNext()) stackIndex.add(new String((byte[]) i.next()));
-                //System.out.println("init    limitStack index");
-                i =    limitStack.iterator(); while (i.hasNext()) stackIndex.add(new String(((kelondroRecords.Node) i.next()).getKey()));
-                //System.out.println("init overhangStack index");
-                i = overhangStack.iterator(); while (i.hasNext()) stackIndex.add(new String(((kelondroRecords.Node) i.next()).getKey()));
-                //System.out.println("init   remoteStack index");
-                i =   remoteStack.iterator(); while (i.hasNext()) stackIndex.add(new String(((kelondroRecords.Node) i.next()).getKey()));
-                //System.out.println("init    imageStack index");
-                i =    imageStack.iterator(); while (i.hasNext()) stackIndex.add(new String(((kelondroRecords.Node) i.next()).getKey()));
-                //System.out.println("init    movieStack index");
-                i =    movieStack.iterator(); while (i.hasNext()) stackIndex.add(new String(((kelondroRecords.Node) i.next()).getKey()));
-                //System.out.println("init    musicStack index");
-                i =    musicStack.iterator(); while (i.hasNext()) stackIndex.add(new String(((kelondroRecords.Node) i.next()).getKey()));
-                //System.out.println("finished           index init");
+                try { i =     coreStack.iterator(); while (i.hasNext()) stackIndex.add(new String((byte[]) i.next()));} catch (Exception e) {coreStack.reset();}
+                try { i =    limitStack.iterator(); while (i.hasNext()) stackIndex.add(new String((byte[]) i.next()));} catch (Exception e) {limitStack.reset();}
+                try { i = overhangStack.iterator(); while (i.hasNext()) stackIndex.add(new String((byte[]) i.next()));} catch (Exception e) {overhangStack.reset();}
+                try { i =   remoteStack.iterator(); while (i.hasNext()) stackIndex.add(new String((byte[]) i.next()));} catch (Exception e) {remoteStack.reset();}
+                try { i =    imageStack.iterator(); while (i.hasNext()) stackIndex.add(new String(((kelondroRecords.Node) i.next()).getKey()));} catch (Exception e) {imageStack = kelondroStack.reset(imageStack);}
+                try { i =    movieStack.iterator(); while (i.hasNext()) stackIndex.add(new String(((kelondroRecords.Node) i.next()).getKey()));} catch (Exception e) {movieStack = kelondroStack.reset(movieStack);}
+                try { i =    musicStack.iterator(); while (i.hasNext()) stackIndex.add(new String(((kelondroRecords.Node) i.next()).getKey()));} catch (Exception e) {musicStack = kelondroStack.reset(musicStack);}
             } catch (IOException e) {}
         }
     }
diff --git a/source/de/anomic/tools/enumerateFiles.java b/source/de/anomic/tools/enumerateFiles.java
index 841670fe8..ef6474b65 100644
--- a/source/de/anomic/tools/enumerateFiles.java
+++ b/source/de/anomic/tools/enumerateFiles.java
@@ -96,17 +96,22 @@ public class enumerateFiles implements Enumeration {
             if (f.isDirectory()) {
                 t = new TreeSet();
                 String[] l = f.list();
-                if (l.length == 0) {
-                    if (delete_emptyFolders) {
-                        f.delete();
-                        f = null;
+                if (l == null) {
+                    // f has disappeared
+                    f = null;
+                } else {
+                    if (l.length == 0) {
+                        if (delete_emptyFolders) {
+                            f.delete();
+                            f = null;
+                        } else {
+                            if (!(return_folders)) f = null;
+                        }
                     } else {
+                        for (int i = 0; i < l.length; i++) t.add(new File(f, l[i]));
+                        hierarchy.add(t);
                         if (!(return_folders)) f = null;
                     }
-                } else {
-                    for (int i = 0; i < l.length; i++) t.add(new File(f, l[i]));
-                    hierarchy.add(t);
-                    if (!(return_folders)) f = null;
                 }
             } else {
                 if (!(return_files)) f = null;