Index: categories_tag_processor.php
===================================================================
--- categories_tag_processor.php	(revision 14318)
+++ categories_tag_processor.php	(working copy)
@@ -455,16 +455,16 @@
 
 	function GetParentCategory($params)
 	{
-		$parent_id = 0;
-		$id_field = $this->Application->getUnitOption($this->Prefix, 'IDField');
-		$table = $this->Application->getUnitOption($this->Prefix,'TableName');
-		$cat_id = $this->Application->GetVar('m_cat_id');
-		if ($cat_id > 0) {
+		$parent_id = $this->Application->getBaseCategory();
+		$category_id = $this->Application->GetVar('m_cat_id');
+
+		if ($category_id != $parent_id) {
 			$sql = 'SELECT ParentId
-					FROM '.$table.'
-					WHERE '.$id_field.' = '.$cat_id;
+					FROM ' . $this->Application->getUnitOption($this->Prefix, 'TableName') . '
+					WHERE ' . $this->Application->getUnitOption($this->Prefix, 'IDField') . ' = ' . $category_id;
 			$parent_id = $this->Conn->GetOne($sql);
 		}
+
 		return $parent_id;
 	}