$ubbt_lang['PM_LENGTH'] = "Total # of posts allowed in a private topic";
$ubbt_lang['PM_LEGNTH_1'] ="When a private topic has more than this many posts, users in this group will not be allowed to add any more posts.";
LENGTH vs LEGNTH_1. The additional information is not shown now.
Is both wrong in stock files+after doing an automatic update on the language files.