Index: units/page_revisions/page_revisions_config.php
===================================================================
--- units/page_revisions/page_revisions_config.php	(revision 15052)
+++ units/page_revisions/page_revisions_config.php	(working copy)
@@ -43,7 +43,7 @@
 		'ListSQLs' => Array (
 			'' => '	SELECT %1$s.* %2$s
 					FROM %1$s
-					JOIN ' . TABLE_PREFIX . '%3$sCategories c ON c.CategoryId = %1$s.PageId
+					LEFT JOIN ' . TABLE_PREFIX . '%3$sCategories c ON c.CategoryId = %1$s.PageId
 					LEFT JOIN ' . TABLE_PREFIX . 'Users created_by ON created_by.PortalUserId = %1$s.CreatedById'
 		),