Index: core/src/main/java/org/yes/cart/service/domain/impl/ProductServiceImpl.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- core/src/main/java/org/yes/cart/service/domain/impl/ProductServiceImpl.java	(revision 437)
+++ core/src/main/java/org/yes/cart/service/domain/impl/ProductServiceImpl.java	(revision )
@@ -597,7 +597,7 @@
      */
     List<FilteredNavigationRecord> getSingleValueNavigationRecords(final String locale, final long productTypeId) {
         List<Object[]> list;
-        final List<FilteredNavigationRecord> records = new ArrayList<FilteredNavigationRecord>();
+        final Set<FilteredNavigationRecord> records = new HashSet<FilteredNavigationRecord>();
 
         final Map<String, Integer> singleNavAttrCodes = attributeService.getSingleNavigatableAttributeCodesByProductType(productTypeId);
         if (!singleNavAttrCodes.isEmpty()) {
@@ -611,7 +611,7 @@
                     "PRODUCTSKUS.ATTR.CODE.VALUES.BY.ATTRCODES", singleNavAttrCodes.keySet());
             appendFilteredNavigationRecords(records, locale, list, attrNames, singleNavAttrCodes);
         }
-        return records;
+        return new ArrayList<FilteredNavigationRecord>(records);
     }
 
 
@@ -655,7 +655,7 @@
 
     private static final I18NModel BLANK = new FailoverStringI18NModel(null, "-");
 
-    private void appendFilteredNavigationRecords(final List<FilteredNavigationRecord> toAppendTo,
+    private void appendFilteredNavigationRecords(final Set<FilteredNavigationRecord> toAppendTo,
                                                  final String locale,
                                                  final List<Object[]> list,
                                                  final Map<String, I18NModel> attrNames,
Index: domain-api/src/main/java/org/yes/cart/domain/queryobject/impl/FilteredNavigationRecordImpl.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- domain-api/src/main/java/org/yes/cart/domain/queryobject/impl/FilteredNavigationRecordImpl.java	(revision 437)
+++ domain-api/src/main/java/org/yes/cart/domain/queryobject/impl/FilteredNavigationRecordImpl.java	(revision )
@@ -200,5 +200,27 @@
 
     }
 
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
 
+        FilteredNavigationRecordImpl that = (FilteredNavigationRecordImpl) o;
+
+        if (rank != that.rank) return false;
+        if (code != null ? !code.equals(that.code) : that.code != null) return false;
+        if (type != null ? !type.equals(that.type) : that.type != null) return false;
+        if (value != null ? !value.equals(that.value) : that.value != null) return false;
+
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        int result = code != null ? code.hashCode() : 0;
+        result = 31 * result + (value != null ? value.hashCode() : 0);
+        result = 31 * result + rank;
+        result = 31 * result + (type != null ? type.hashCode() : 0);
+        return result;
+    }
 }