diff --git a/src/org/zlibrary/core/options/ZLBoolean3Option.java b/src/org/zlibrary/core/options/ZLBoolean3Option.java
index 92ea2c786..36224e743 100644
--- a/src/org/zlibrary/core/options/ZLBoolean3Option.java
+++ b/src/org/zlibrary/core/options/ZLBoolean3Option.java
@@ -10,7 +10,7 @@ import org.zlibrary.core.options.util.*;
  */
 public final class ZLBoolean3Option extends ZLSimpleOption {
 
-    private	ZLBoolean3 myValue;
+	private	ZLBoolean3 myValue;
 	private	final ZLBoolean3 myDefaultValue;
 	
 	public ZLBoolean3Option(String category, String group, String optionName, ZLBoolean3 defaultValue) {	 
@@ -26,8 +26,10 @@ public final class ZLBoolean3Option extends ZLSimpleOption {
 	public ZLBoolean3 getValue() {
 		if (!myIsSynchronized) {
 			String value = myConfig.getValue(myGroup, myOptionName, 
-                    myDefaultValue.toString());
-			myValue = ZLFromStringConverter.getBoolean3Value(value);
+							null);
+			if (value != null) {
+				myValue = ZLFromStringConverter.getBoolean3Value(value);
+			}
 			myIsSynchronized = true;
 		}
 		return myValue;
diff --git a/src/org/zlibrary/core/options/ZLBooleanOption.java b/src/org/zlibrary/core/options/ZLBooleanOption.java
index 01fc8bee3..a7266b950 100644
--- a/src/org/zlibrary/core/options/ZLBooleanOption.java
+++ b/src/org/zlibrary/core/options/ZLBooleanOption.java
@@ -16,13 +16,11 @@ public final class ZLBooleanOption extends ZLSimpleOption {
 
 	public boolean getValue() {
 		if (!myIsSynchronized) {
-			String value;
-            if (myDefaultValue) {
-                value = myConfig.getValue(myGroup, myOptionName, "true");
-            } else {
-                value = myConfig.getValue(myGroup, myOptionName, "false");
-            }
-			myValue = ZLFromStringConverter.getBooleanValue(value);
+			
+			String value = myConfig.getValue(myGroup, myOptionName, null);
+			if (value != null) {
+				myValue = ZLFromStringConverter.getBooleanValue(value);
+			}
 			myIsSynchronized = true;
 		}
 		return myValue;
@@ -37,11 +35,11 @@ public final class ZLBooleanOption extends ZLSimpleOption {
 		if (myValue == myDefaultValue) {
 			myConfig.unsetValue(myGroup, myOptionName);
 		} else {
-            if (myValue) {
-                myConfig.setValue(myGroup, myOptionName, "true", myCategory);
-            } else {
-                myConfig.setValue(myGroup, myOptionName, "false", myCategory);
-            }
+			if (myValue) {
+				myConfig.setValue(myGroup, myOptionName, "true", myCategory);
+			} else {
+				myConfig.setValue(myGroup, myOptionName, "false", myCategory);
+			}
 		}
 	}
 }
diff --git a/src/org/zlibrary/core/options/ZLColorOption.java b/src/org/zlibrary/core/options/ZLColorOption.java
index b3268fe0b..c35bdcc39 100644
--- a/src/org/zlibrary/core/options/ZLColorOption.java
+++ b/src/org/zlibrary/core/options/ZLColorOption.java
@@ -22,9 +22,10 @@ public final class ZLColorOption extends ZLOption {
 	
 	public int getValue() {
 		if (!myIsSynchronized) {
-			String strDefaultValue = ((Integer)myDefaultValue).toString();
-			String value = myConfig.getValue(myGroup, myOptionName, strDefaultValue);
-			myIntValue = ZLFromStringConverter.getIntegerValue(value);
+			String value = myConfig.getValue(myGroup, myOptionName, null);
+			if (value != null) {
+				myIntValue = ZLFromStringConverter.getIntegerValue(value);
+			}
 			myIsSynchronized = true;
 		}
 		return myIntValue;
diff --git a/src/org/zlibrary/core/options/ZLDoubleOption.java b/src/org/zlibrary/core/options/ZLDoubleOption.java
index dc406a14d..9d82aad2c 100644
--- a/src/org/zlibrary/core/options/ZLDoubleOption.java
+++ b/src/org/zlibrary/core/options/ZLDoubleOption.java
@@ -17,9 +17,11 @@ public final class ZLDoubleOption extends ZLOption{
 	
 	public double getValue() {
 		if (!myIsSynchronized) {
-			String strDefaultValue = ((Double)myDefaultValue).toString();
-			String value = myConfig.getValue(myGroup, myOptionName, strDefaultValue);
-			myValue = ZLFromStringConverter.getDoubleValue(value);
+			String value = myConfig.getValue(myGroup, myOptionName, 
+							null);
+			if (value != null) {
+				myValue = ZLFromStringConverter.getDoubleValue(value);
+			}
 			myIsSynchronized = true;
 		}
 		return myValue;
diff --git a/src/org/zlibrary/core/options/ZLFromStringConverter.java b/src/org/zlibrary/core/options/ZLFromStringConverter.java
index 130bcb154..70f4678ab 100644
--- a/src/org/zlibrary/core/options/ZLFromStringConverter.java
+++ b/src/org/zlibrary/core/options/ZLFromStringConverter.java
@@ -5,14 +5,14 @@ import org.zlibrary.core.options.util.ZLColor;
 
 /*package*/ class ZLFromStringConverter {
 	
-    public static ZLBoolean3 getBoolean3Value(String input){
+	public static ZLBoolean3 getBoolean3Value(String input){
 		if (input.toLowerCase().equals("true")) {
 			return ZLBoolean3.B3_TRUE;
 		}
-        if (input.toLowerCase().equals("false")) {
+		if (input.toLowerCase().equals("false")) {
 			return ZLBoolean3.B3_FALSE;
-        }
-        return ZLBoolean3.B3_UNDEFINED;
+		}
+		return ZLBoolean3.B3_UNDEFINED;
 	}
 	
 	public static boolean getBooleanValue(String input){
@@ -24,22 +24,23 @@ import org.zlibrary.core.options.util.ZLColor;
 	}
 
 	public static double getDoubleValue(String input){
-        try {
-            double value = Double.parseDouble(input);
-            return value;
-        } catch (NumberFormatException e) {
-            System.err.println("wrong format : " + input);
-            return 0;
-        }
+		try {
+			double value = Double.parseDouble(input);
+			return value;
+		} catch (NumberFormatException e) {
+			System.err.println("wrong format : " + input);
+			return 0;
+		}
 	}
 
 	public static int getIntegerValue(String input){
-        try {
-            int value = Integer.parseInt(input);
-            return value;
-        } catch (NumberFormatException e) {
-            System.err.println("wrong format : " + input);
-            return 0;
-        }
+		try {
+			int value = Integer.parseInt(input);
+			return value;
+		} catch (NumberFormatException e) {
+			//e.printStackTrace();
+			System.err.println("wrong format : " + input);
+			return 0;
+		}
 	}
 }
diff --git a/src/org/zlibrary/core/options/ZLIntegerOption.java b/src/org/zlibrary/core/options/ZLIntegerOption.java
index 7b290f9a0..e9dbfd4b2 100644
--- a/src/org/zlibrary/core/options/ZLIntegerOption.java
+++ b/src/org/zlibrary/core/options/ZLIntegerOption.java
@@ -17,9 +17,10 @@ public final class ZLIntegerOption extends ZLOption{
 	
 	public int getValue() {
 		if (!myIsSynchronized) {
-			String strDefaultValue = ((Integer)myDefaultValue).toString();
-			String value = myConfig.getValue(myGroup, myOptionName, strDefaultValue);
-			myValue = ZLFromStringConverter.getIntegerValue(value);
+			String value = myConfig.getValue(myGroup, myOptionName, null);
+			if (value != null) {
+				myValue = ZLFromStringConverter.getIntegerValue(value);
+			}
 			myIsSynchronized = true;
 		}
 		return myValue;
diff --git a/src/org/zlibrary/core/options/ZLIntegerRangeOption.java b/src/org/zlibrary/core/options/ZLIntegerRangeOption.java
index c90b5594b..cbf1063d9 100644
--- a/src/org/zlibrary/core/options/ZLIntegerRangeOption.java
+++ b/src/org/zlibrary/core/options/ZLIntegerRangeOption.java
@@ -30,10 +30,10 @@ public final class ZLIntegerRangeOption extends ZLOption {
 	
 	public int getValue() {
 		if (!myIsSynchronized) {
-			String strDefaultValue = ((Integer)myDefaultValue).toString();
-			String value = myConfig.getValue(myGroup, 
-					myOptionName, strDefaultValue);
-			myValue = ZLFromStringConverter.getIntegerValue(value);
+			String value = myConfig.getValue(myGroup, myOptionName, null);
+			if (value != null) {
+				myValue = ZLFromStringConverter.getIntegerValue(value);
+			}
 			myIsSynchronized = true;
 		}
 		return myValue;
diff --git a/src/org/zlibrary/core/options/ZLOption.java b/src/org/zlibrary/core/options/ZLOption.java
index ac62d8049..c2a39686c 100644
--- a/src/org/zlibrary/core/options/ZLOption.java
+++ b/src/org/zlibrary/core/options/ZLOption.java
@@ -26,8 +26,8 @@ public abstract class ZLOption {
 		myCategory = category;
 		myGroup = group;
 		myOptionName = name;
-        myIsSynchronized = false;
-        myConfig.setCategory(group, name, category);
+		myIsSynchronized = false;
+		myConfig.setCategory(group, name, category);
 	}
 	
 	/**
diff --git a/src/org/zlibrary/core/options/config/ZLConfig.java b/src/org/zlibrary/core/options/config/ZLConfig.java
index d4de8860c..360dd75b4 100644
--- a/src/org/zlibrary/core/options/config/ZLConfig.java
+++ b/src/org/zlibrary/core/options/config/ZLConfig.java
@@ -3,6 +3,6 @@ package org.zlibrary.core.options.config;
 public interface ZLConfig extends ZLSimpleConfig {
 	public void applyDelta();
 	public void clearDelta();
-    public ZLDeltaConfig getDelta();
-    public void setCategory(String group, String name, String category);
+	public ZLDeltaConfig getDelta();
+	public void setCategory(String group, String name, String category);
 }
diff --git a/src/org/zlibrary/core/options/config/ZLConfigImpl.java b/src/org/zlibrary/core/options/config/ZLConfigImpl.java
index 28ca861d3..6222ca030 100644
--- a/src/org/zlibrary/core/options/config/ZLConfigImpl.java
+++ b/src/org/zlibrary/core/options/config/ZLConfigImpl.java
@@ -11,10 +11,10 @@ import java.util.Map;
 		myDeltaConfig = new ZLDeltaConfig();
 	}
 
-    public ZLDeltaConfig getDelta() {
-        return myDeltaConfig;
-    }
-    
+	public ZLDeltaConfig getDelta() {
+		return myDeltaConfig;
+	}
+	
 	public Map<String, ZLGroup> getGroups() {
 		return myMainConfig.getGroups();
 	}
@@ -22,9 +22,9 @@ import java.util.Map;
 	public String getValue(String group, String name, String defaultValue) {
 		String value = myDeltaConfig.getValue(group, name, defaultValue);
 		if (value == defaultValue) {
-		    value = myMainConfig.getValue(group, name, defaultValue);
+			value = myMainConfig.getValue(group, name, defaultValue);
 		}
-        return value;
+		return value;
 	}
 	
 	public void setCategory(String group, String name, String cat) {
@@ -55,9 +55,9 @@ import java.util.Map;
 		
 		Map<String, ZLGroup> deletedValues = myDeltaConfig.getDeletedValues().getGroups();
 		for (String group : deletedValues.keySet()) {
-            for (ZLOptionValue option : deletedValues.get(group).getValues()) {
-                myMainConfig.unsetValue(group, option.getName());
-            }
+			for (ZLOptionValue option : deletedValues.get(group).getValues()) {
+				myMainConfig.unsetValue(group, option.getName());
+			}
 		}
 		
 		ZLSimpleConfigImpl setValues = myDeltaConfig.getSetValues();
diff --git a/src/org/zlibrary/core/options/config/ZLDeltaConfig.java b/src/org/zlibrary/core/options/config/ZLDeltaConfig.java
index c85d5f689..d1c3d1e47 100644
--- a/src/org/zlibrary/core/options/config/ZLDeltaConfig.java
+++ b/src/org/zlibrary/core/options/config/ZLDeltaConfig.java
@@ -30,13 +30,13 @@ import java.util.*;
 	public void setValue(String group, String name, String value, String category) {
 		mySetValues.setValue(group, name, value, category);
 	}
-    
-    public void setCategory(String group, String name, String cat) {
-        mySetValues.setCategory(group, name, cat);
-    }
+	
+	public void setCategory(String group, String name, String cat) {
+		mySetValues.setCategory(group, name, cat);
+	}
 	
 	public void unsetValue(String group, String name) {
-        //TODO ÝÒÎ ÏËÎÕÎ??
+		//TODO ÝÒÎ ÏËÎÕÎ??
 		myDeletedValues.setValue(group, name, null, null);
 		mySetValues.unsetValue(group, name);
 	}
@@ -51,34 +51,34 @@ import java.util.*;
 		myDeletedGroups.clear();
 		mySetValues.clear();
 	}
-    
-    public String toString() {
-        StringBuffer sb = new StringBuffer("<delta>\n  <delete>\n");
-        for (String group : myDeletedGroups) {
-            sb.append("    <group name=\"" + group + "\"/>\n");
-        }
+	
+	public String toString() {
+		StringBuffer sb = new StringBuffer("<delta>\n  <delete>\n");
+		for (String group : myDeletedGroups) {
+			sb.append("    <group name=\"" + group + "\"/>\n");
+		}
 
-        Map<String, ZLGroup> values = myDeletedValues.getGroups();
-        for (String group : values.keySet()) {
-            sb.append("    <group name=\"" + group + "\">\n");
-            for (ZLOptionValue option : values.get(group).getValues()) {
-                sb.append("      <option name=\"" + option.getName() + "\"/>\n");
-            }
-            sb.append("    </group>\n");
-        }
-        sb.append("  </delete>\n");
-        
-        values = mySetValues.getGroups();
-        for (String group : values.keySet()) {
-            sb.append("  <group name=\"" + group + "\">\n");
-            for (ZLOptionValue option : values.get(group).getValues()) {
-                sb.append("    <option name=\"" + option.getName() + "\" ");
-                sb.append("value=\"" + option.getValue() + "\" ");
-                sb.append("category=\"" + option.getCategory() + "\">\n");
-            }
-            sb.append("  </group>\n");
-        }
-        sb.append("</delta>");
-        return sb.toString();
-    }
+		Map<String, ZLGroup> values = myDeletedValues.getGroups();
+		for (String group : values.keySet()) {
+			sb.append("    <group name=\"" + group + "\">\n");
+			for (ZLOptionValue option : values.get(group).getValues()) {
+				sb.append("      <option name=\"" + option.getName() + "\"/>\n");
+			}
+			sb.append("    </group>\n");
+		}
+		sb.append("  </delete>\n");
+		
+		values = mySetValues.getGroups();
+		for (String group : values.keySet()) {
+			sb.append("  <group name=\"" + group + "\">\n");
+			for (ZLOptionValue option : values.get(group).getValues()) {
+				sb.append("    <option name=\"" + option.getName() + "\" ");
+				sb.append("value=\"" + option.getValue() + "\" ");
+				sb.append("category=\"" + option.getCategory() + "\">\n");
+			}
+			sb.append("  </group>\n");
+		}
+		sb.append("</delta>");
+		return sb.toString();
+	}
 }
diff --git a/src/org/zlibrary/core/options/config/ZLGroup.java b/src/org/zlibrary/core/options/config/ZLGroup.java
index 3c816d4f6..cb34f6637 100644
--- a/src/org/zlibrary/core/options/config/ZLGroup.java
+++ b/src/org/zlibrary/core/options/config/ZLGroup.java
@@ -13,10 +13,10 @@ public final class ZLGroup {
 		return Collections.unmodifiableCollection(myData.values());
 	}
 	
-    protected ZLOptionValue getOption(String name) {
-        return myData.get(name);
-    }
-    
+	protected ZLOptionValue getOption(String name) {
+		return myData.get(name);
+	}
+	
 	public String getValue(String name){
 		ZLOptionValue temp = myData.get(name);
 		if (temp != null){
diff --git a/src/org/zlibrary/core/options/config/ZLOptionValue.java b/src/org/zlibrary/core/options/config/ZLOptionValue.java
index 2e2d72a0b..491d8ea64 100644
--- a/src/org/zlibrary/core/options/config/ZLOptionValue.java
+++ b/src/org/zlibrary/core/options/config/ZLOptionValue.java
@@ -6,15 +6,15 @@ public class ZLOptionValue {
 	private String myName = "";
 	
 	public ZLOptionValue(String name, String value, String category) {
-        if (value != null) {
-            myValue = value.intern();
-        }
-        if (category != null) {
-            myCategory = category.intern();
-        }
-        if (name != null) {
-            myName = name.intern();
-        }
+		if (value != null) {
+			myValue = value.intern();
+		}
+		if (category != null) {
+			myCategory = category.intern();
+		}
+		if (name != null) {
+			myName = name.intern();
+		}
 	}
 	
 	public void setValue(String value) {
@@ -34,10 +34,10 @@ public class ZLOptionValue {
 	public String getCategory() {
 		return myCategory;
 	}
-    
-    public void setCategory(String cat) {
-        myCategory = cat;
-    }
+	
+	public void setCategory(String cat) {
+		myCategory = cat;
+	}
 	
 	public String toString() {
 		return "    <option name=\"" + myName 
diff --git a/src/org/zlibrary/core/options/config/ZLSimpleConfigImpl.java b/src/org/zlibrary/core/options/config/ZLSimpleConfigImpl.java
index 1161f6dfa..0887f9b28 100644
--- a/src/org/zlibrary/core/options/config/ZLSimpleConfigImpl.java
+++ b/src/org/zlibrary/core/options/config/ZLSimpleConfigImpl.java
@@ -42,16 +42,16 @@ import java.util.*;
 		}
 	}
 	
-    public void setCategory(String group, String name, String cat) {
-        ZLGroup gr = myData.get(group);
-        if (gr != null){
-            ZLOptionValue option = gr.getOption(name);
-            if (option != null) {
-                option.setCategory(cat);
-            }
-        } 
-    }
-    
+	public void setCategory(String group, String name, String cat) {
+		ZLGroup gr = myData.get(group);
+		if (gr != null){
+			ZLOptionValue option = gr.getOption(name);
+			if (option != null) {
+				option.setCategory(cat);
+			}
+		} 
+	}
+	
 	public void setValue(String group, String name, String value, String category) {
 		if (myData.get(group) != null){
 			myData.get(group).setValue(name, value, category);
@@ -63,10 +63,10 @@ import java.util.*;
 	}
 	
 	public void unsetValue(String group, String name) {
-        ZLGroup gr = myData.get(group);
-        if (gr != null) {
-            gr.unsetValue(name);
-        }
+		ZLGroup gr = myData.get(group);
+		if (gr != null) {
+			gr.unsetValue(name);
+		}
 	}
 	
 	/**
diff --git a/src/org/zlibrary/core/options/config/reader/ZLConfigReader.java b/src/org/zlibrary/core/options/config/reader/ZLConfigReader.java
index cbbb63d33..29253fdf2 100644
--- a/src/org/zlibrary/core/options/config/reader/ZLConfigReader.java
+++ b/src/org/zlibrary/core/options/config/reader/ZLConfigReader.java
@@ -162,8 +162,7 @@ import org.zlibrary.core.options.config.*;
 	 * 
 	 * Ïðî÷èòàòü äàííûå èç ôàéëà XML
 	 * 
-	 * @param file -
-	 *            ôàéë XML
+	 * @param file ôàéë XML
 	 */
 	public void readFile(File file) {
 		try {
diff --git a/src/org/zlibrary/core/options/config/writer/ZLConfigWriter.java b/src/org/zlibrary/core/options/config/writer/ZLConfigWriter.java
index 0830b4eb8..d95b483e9 100644
--- a/src/org/zlibrary/core/options/config/writer/ZLConfigWriter.java
+++ b/src/org/zlibrary/core/options/config/writer/ZLConfigWriter.java
@@ -38,8 +38,8 @@ import org.zlibrary.core.options.config.*;
 	
 	public void writeDelta() {
 		//TODO ÄÎÏÈÑÀÒÜ, ÈÑÏÎËÜÇÓß ÑÒÐÎÅÍÈÅ ÔÀÉËÀ ÄÅËÜÒÛ ÈÇ ÑÈØÍÎÃÎ ÊÎÄÀ
-            this.writeConfigFile("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
-                    + myConfig.getDelta(), myDestinationDirectory + "/delta.xml");
+		this.writeConfigFile("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
+				+ myConfig.getDelta(), myDestinationDirectory + "/delta.xml");
 	}
 	
 	public void write() {
diff --git a/src/org/zlibrary/core/options/config/writer/ZLWriter.java b/src/org/zlibrary/core/options/config/writer/ZLWriter.java
index 8a13522db..fbcd2f19f 100644
--- a/src/org/zlibrary/core/options/config/writer/ZLWriter.java
+++ b/src/org/zlibrary/core/options/config/writer/ZLWriter.java
@@ -2,5 +2,5 @@ package org.zlibrary.core.options.config.writer;
 
 public interface ZLWriter {
 	public void write();
-    public void writeDelta();
+	public void writeDelta();
 }
diff --git a/test/org/test/zlibrary/options/example/Main.java b/test/org/test/zlibrary/options/example/Main.java
index 59382787f..69a487c9e 100644
--- a/test/org/test/zlibrary/options/example/Main.java
+++ b/test/org/test/zlibrary/options/example/Main.java
@@ -36,10 +36,10 @@ public class Main {
 		ZLConfigInstance.getInstance().unsetValue("MYGROUP", 
 		"lengthChangeable");*/
 		
-        String output = "test/org/test/zlibrary/options/example/output/";
-        //ZLConfigWriterFactory.createConfigWriter(output).writeDelta();
+		String output = "test/org/test/zlibrary/options/example/output/";
+		//ZLConfigWriterFactory.createConfigWriter(output).writeDelta();
 		ZLConfigWriterFactory.createConfigWriter(output).write();
-        //ZLConfigWriterFactory.createConfigWriter(output + "cleared-").writeDelta();
+		//ZLConfigWriterFactory.createConfigWriter(output + "cleared-").writeDelta();
 	}
 	
 }