diff --git a/src/main/java/info/bukova/isspst/sort/CzechSortListheader.java b/src/main/java/info/bukova/isspst/sort/CzechSortListheader.java
index bed92a0a..23496978 100644
--- a/src/main/java/info/bukova/isspst/sort/CzechSortListheader.java
+++ b/src/main/java/info/bukova/isspst/sort/CzechSortListheader.java
@@ -8,10 +8,10 @@ public class CzechSortListheader extends Listheader {
 	@Override
 	public void setSort(String type) {
 		
-		if (type.startsWith("auto"))
+		if (type.startsWith("czech"))
 		{
 			// czech(propertyName)
-			String propertyName = type.substring("auto(".length(), type.length() - 1);
+			String propertyName = type.substring("czech(".length(), type.length() - 1);
 			this.setSortAscending(new CzechStringComparator(propertyName, true));
 			this.setSortDescending(new CzechStringComparator(propertyName, false));
 		}
diff --git a/src/main/java/info/bukova/isspst/sort/CzechStringComparator.java b/src/main/java/info/bukova/isspst/sort/CzechStringComparator.java
index 99b536f7..58c5d82f 100644
--- a/src/main/java/info/bukova/isspst/sort/CzechStringComparator.java
+++ b/src/main/java/info/bukova/isspst/sort/CzechStringComparator.java
@@ -7,6 +7,8 @@ import java.text.ParseException;
 import java.text.RuleBasedCollator;
 import java.util.Comparator;
 
+import org.zkoss.zk.ui.util.Clients;
+
 public class CzechStringComparator implements Comparator<Object> {
 	private String m_rule;
 	private final String m_property;
@@ -16,6 +18,7 @@ public class CzechStringComparator implements Comparator<Object> {
 
 	public CzechStringComparator(String property, boolean ascending) {
 		m_rule = "";
+		m_rule += "< 0 < 1 < 2 < 3 < 4 < 5 < 6 < 7 < 8 < 9 ";
 		m_rule += "< A,a < Á,á < Ä,ä ";
 		m_rule += "< B,b ";
 		m_rule += "< C,c < Ć,ć < Č,č ";
@@ -50,7 +53,6 @@ public class CzechStringComparator implements Comparator<Object> {
 
 	@Override
 	public int compare(Object argL, Object argR) {
-
 		try {
 			return this.internalCompare(argL, argR);
 
@@ -87,29 +89,31 @@ public class CzechStringComparator implements Comparator<Object> {
 		Object valR = m_getter.invoke(argR);
 		boolean isNullValL = (valL == null);
 		boolean isNullValR = (valR == null);
-		
+
 		int result = 0;
-		
-		if (isNullValL || isNullValR)
-		{
-			if (isNullValL && isNullValR)
-			{
+
+		if (isNullValL || isNullValR) {
+			if (isNullValL && isNullValR) {
 				result = 0;
-			}
-			else if (isNullValL)
-			{
+			} else if (isNullValL) {
 				result = -1;
-			}
-			else
-			{
+			} else {
 				result = 1;
 			}
+		} else {
+
+			if (valL instanceof String) {
+				result = m_comparator.compare(valL, valR);
+			} else {
+				String className = valL.getClass().getName();
+				Clients.alert(
+						"Nepodporovaný datový typ '"
+								+ className
+								+ "' pro třídění 'sort=czech(...)'. Použít 'sort=auto(...)'",
+						"Franta", Clients.NOTIFICATION_TYPE_WARNING);
+			}
 		}
-		else
-		{
-			result = m_comparator.compare(valL, valR);
-		}
-		
+
 		return (m_ascending ? result : -result);
 	}
 }
diff --git a/src/main/webapp/admin/addressbook/addressbook.zul b/src/main/webapp/admin/addressbook/addressbook.zul
index af006151..112721b8 100644
--- a/src/main/webapp/admin/addressbook/addressbook.zul
+++ b/src/main/webapp/admin/addressbook/addressbook.zul
@@ -8,12 +8,12 @@
 		<hbox width="100%">
 			<listbox id="dataGrid" model="@load(vm.dataList)" selectedItem="@bind(vm.dataBean)" onAfterRender="@command('afterRender')" selectedIndex="@load(vm.selIndex)" hflex="6" height="480px">
 				<listhead vflex="true" menupopup="auto">
-					<listheader label="${labels.SuppliersGridColumnCompany}" sort="auto(company)" />
+					<listheader label="${labels.SuppliersGridColumnCompany}" sort="czech(company)" />
 					<listheader label="${labels.SuppliersGridColumnIC}" sort="auto(ic)" width="100px" />
-					<listheader label="${labels.SuppliersGridColumnContact}" sort="auto(contactName)" />
-					<listheader label="${labels.SuppliersGridColumnStreet}" sort="auto(street)" />
-					<listheader label="${labels.SuppliersGridColumnNo}" sort="auto(houseNumber)" width="80px" />
-					<listheader label="${labels.SuppliersGridColumnCity}" sort="auto(city)" />
+					<listheader label="${labels.SuppliersGridColumnContact}" sort="czech(contactName)" />
+					<listheader label="${labels.SuppliersGridColumnStreet}" sort="czech(street)" />
+					<listheader label="${labels.SuppliersGridColumnNo}" sort="czech(houseNumber)" width="80px" />
+					<listheader label="${labels.SuppliersGridColumnCity}" sort="czech(city)" />
 				</listhead>
 
 				<auxhead sclass="category-center" visible="@load(vm.filter)">
diff --git a/src/main/webapp/admin/permissions/permissions.zul b/src/main/webapp/admin/permissions/permissions.zul
index 744114ba..c3a1ca7b 100644
--- a/src/main/webapp/admin/permissions/permissions.zul
+++ b/src/main/webapp/admin/permissions/permissions.zul
@@ -11,7 +11,7 @@
 	<hbox width="100%">	
 	<listbox model="@load(vm.dataList)" selectedItem="@bind(vm.dataBean)" width="300px">
 		<listhead>
-			<listheader label="${labels.RightsGridRole}"/>
+			<listheader label="${labels.RightsGridRole}" />
 		</listhead>
 		<template name="model">
 			<listitem>
diff --git a/src/main/webapp/admin/users/users.zul b/src/main/webapp/admin/users/users.zul
index f02b5fb2..81ef6c55 100644
--- a/src/main/webapp/admin/users/users.zul
+++ b/src/main/webapp/admin/users/users.zul
@@ -8,10 +8,10 @@
 		<hbox width="100%" height="500px">
 			<listbox model="@load(vm.dataList)" selectedItem="@bind(vm.dataBean)" width="650px" height="480px">
 				<listhead menupopup="auto">
-					<listheader label="${labels.UsersGridColumnLogin}" sort="auto(username)" />
-					<listheader label="${labels.UsersGridColumnPersonalID}" sort="auto(personalNumber)" />
-					<listheader label="${labels.UsersGridColumnFirstName}" sort="auto(firstName)" />
-					<listheader label="${labels.UsersGridColumnSureName}" sort="auto(lastName)" />
+					<listheader label="${labels.UsersGridColumnLogin}" sort="czech(username)" />
+					<listheader label="${labels.UsersGridColumnPersonalID}" sort="czech(personalNumber)" />
+					<listheader label="${labels.UsersGridColumnFirstName}" sort="czech(firstName)" />
+					<listheader label="${labels.UsersGridColumnSureName}" sort="czech(lastName)" />
 				</listhead>
 
 				<auxhead sclass="category-center" visible="@load(vm.filter)">
diff --git a/src/main/webapp/buildings/building.zul b/src/main/webapp/buildings/building.zul
index 969a56b8..11e2ac86 100644
--- a/src/main/webapp/buildings/building.zul
+++ b/src/main/webapp/buildings/building.zul
@@ -7,9 +7,9 @@
 
 		<listbox model="@load(vm.dataList)" selectedItem="@bind(vm.dataBean)">
 			<listhead menupopup="auto">
-				<listheader label="${labels.BuildingsGridColumnCode}" sort="auto(code)" width="10%" />
-				<listheader label="${labels.BuildingsGridColumnName}" sort="auto(name)" width="30%" />
-				<listheader label="${labels.BuildingsGridColumnDescription}" sort="auto(description)" width="60%" />
+				<listheader label="${labels.BuildingsGridColumnCode}" sort="czech(code)" width="10%" />
+				<listheader label="${labels.BuildingsGridColumnName}" sort="czech(name)" width="30%" />
+				<listheader label="${labels.BuildingsGridColumnDescription}" sort="czech(description)" width="60%" />
 			</listhead>
 			
 			<auxhead sclass="category-center" visible="@load(vm.filter)">