Index: lutinutil/src/java/org/codelutin/option/Config.java
diff -u lutinutil/src/java/org/codelutin/option/Config.java:1.8 lutinutil/src/java/org/codelutin/option/Config.java:1.9
--- lutinutil/src/java/org/codelutin/option/Config.java:1.8	Mon Jan  7 21:19:21 2008
+++ lutinutil/src/java/org/codelutin/option/Config.java	Tue Jan  8 01:15:43 2008
@@ -23,6 +23,7 @@
 import static org.codelutin.i18n.I18n._;
 import org.codelutin.util.ReflectUtil;
 
+import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
 import java.io.File;
 import java.io.FileInputStream;
@@ -148,7 +149,7 @@
         if (source == null) {
             return;
         }
-        store(out, "save configuration [" + category + "] ");
+        store(out, null, "save configuration [" + category + "] ");
         clearModified();
     }
 
@@ -156,15 +157,24 @@
         if (source == null) {
             return;
         }
+        // since config store file can contain more than one Config we must
+        // obtain first all
+        Properties props = new Properties();
+
+        BufferedInputStream in = new BufferedInputStream(new FileInputStream(source));
+        props.load(in);
+        in.close();
         BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(source));
-        store(out, "save configuration [" + category + "] ");
+        store(out, props, "save configuration [" + category + "] ");
+        out.close();
         clearModified();
     }
+
     public void saveSafely() {
         try {
             save();
         } catch (IOException e) {
-            log.warn(_("could not save config {0} for reason {1}",getCategory(),e.getMessage()),e);
+            log.warn(_("could not save config {0} for reason {1}", getCategory(), e.getMessage()), e);
         }
     }
 
@@ -464,10 +474,11 @@
      * <b>Unsafe data are not stored!</b>
      *
      * @param out      where to store
+     * @param props    optional properties to save
      * @param comments comment to add in file
      * @throws IOException if any problem while saving
      */
-    protected void store(OutputStream out, String comments) throws IOException {
+    protected void store(OutputStream out, Properties props, String comments) throws IOException {
         getTmp().clear();
         try {
             if (!isEmpty()) {
@@ -475,6 +486,16 @@
                     Object val = key.getCurrentValue();
                     // a shame that Properties.store can only deal with String value
                     getTmp().put(key.getKey(), val == null ? "" : val.toString());
+                    if (props != null) {
+                        props.remove(key.getKey());
+                    }
+                }
+            }
+            if (props != null) {
+                for (Map.Entry<Object, Object> entry : props.entrySet()) {
+                    if (entry.getValue() != null) {
+                        getTmp().put(entry.getKey(), entry.getValue() + "");
+                    }
                 }
             }
             getTmp().store(out, comments);
@@ -519,7 +540,7 @@
             s.append(", unsafe:").append(unsafeData.size());
         }
         s.append('>');
-        if (source!=null) {
+        if (source != null) {
             s.append("\nsource:").append(source);
         }
         if (!isEmpty()) {
@@ -551,7 +572,7 @@
 
     /** @throws IOException if any */
     protected void loadFromSource() throws IOException {
-        if (source == null|| !source.exists()) {
+        if (source == null || !source.exists()) {
             return;
         }
         InputStream inputStream = new FileInputStream(source);