Several of 'Limited PHP code' - like the_author() and the_author_meta() - do not work in all places in the 'single.php, page.php and even the postformat.php. Thanks to 'goater' for finding the issue.
The following patch corrects this issue.
edit the file 'montezuma/includes/parse_php.php' and change line 28-30 from
HTML Code:
$need_loop = array( 'the_content' ); // the_content needs loop if( in_array( $function_name, $need_loop ) ) {
HTML Code:
$need_loop = array( 'the_author', 'the_author_meta', 'the_author_post_links', 'the_content', 'the_date', 'the_excerpt' ); // functions that needs the loop if( !in_the_loop() && in_array( $function_name, $need_loop ) ) {