<h4>Newsfeed Fatal Error Fix</h4><ul><li><strong>Fixed:</strong> HTTP 500 on deletePost, banPost, savePost — PHP 8 fatal error "Cannot use isset() on the result of an expression" at line 741. The previous null coalescing fix changed isset($r["isgroup"]) to isset(($r["isgroup"] ?? 0)) which is invalid in PHP 8. Changed to empty($r["isgroup"]) which correctly checks both existence and truthiness.</li></ul>