Index: branches/RC/core/units/categories/categories_item.php
===================================================================
diff -u -r8929 -r9368
--- branches/RC/core/units/categories/categories_item.php	(.../categories_item.php)	(revision 8929)
+++ branches/RC/core/units/categories/categories_item.php	(.../categories_item.php)	(revision 9368)
@@ -88,13 +88,18 @@
 			if(!$filename) return $filename;
 
 			$item_id = !$this->GetID() ? 0 : $this->GetID();
+			
+			if ($item_id) {
+				$parent_cat_id = $this->GetDBField("ParentId");				
+				$check_in_parent_cat_only = ' AND ParentId = '.$parent_cat_id;
+			}
 
 			// check temp table
-			$sql_temp = 'SELECT '.$this->IDField.' FROM '.$this->TableName.' WHERE Filename = '.$this->Conn->qstr($filename);
+			$sql_temp = 'SELECT '.$this->IDField.' FROM '.$this->TableName.' WHERE Filename = '.$this->Conn->qstr($filename).$check_in_parent_cat_only;
 			$found_temp_ids = $this->Conn->GetCol($sql_temp);
 
 			// check live table
-			$sql_live = 'SELECT '.$this->IDField.' FROM '.$this->Application->GetLiveName($this->TableName).' WHERE Filename = '.$this->Conn->qstr($filename);
+			$sql_live = 'SELECT '.$this->IDField.' FROM '.$this->Application->GetLiveName($this->TableName).' WHERE Filename = '.$this->Conn->qstr($filename).$check_in_parent_cat_only;
 			$found_live_ids = $this->Conn->GetCol($sql_live);
 
 			$found_item_ids = array_unique( array_merge($found_temp_ids, $found_live_ids) );