Index: branches/unlabeled/unlabeled-1.7.2/core/units/general/helpers/mod_rewrite_helper.php
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diff -u -r7466 -r7508
--- branches/unlabeled/unlabeled-1.7.2/core/units/general/helpers/mod_rewrite_helper.php	(.../mod_rewrite_helper.php)	(revision 7466)
+++ branches/unlabeled/unlabeled-1.7.2/core/units/general/helpers/mod_rewrite_helper.php	(.../mod_rewrite_helper.php)	(revision 7508)
@@ -74,7 +74,7 @@
 			{
 				$category_path = trim($category_path.'/'.$url_part, '/');
 
-				if( preg_match('/(.*)_([\d]+)$/', $category_path, $rets) )
+				if( !preg_match('/^bb_[\d]+/', $url_part) && preg_match('/(.*)_([\d]+)$/', $category_path, $rets) )
 				{
 					$category_path = $rets[1];
 					$vars['m_cat_page'] = $rets[2];