The admin/check.php script checks whether the php.ini value post_max_size is at least upload_max_filesize, but the reported message is saying upload_max_size instead of upload_max_filesize.

script code:
check_print_test_row(
'post_max_size php.ini directive is at least equal to the upload_max_size directive',
ini_get_number( 'post_max_size' ) >= ini_get_number( 'upload_max_filesize' ),
array( false => 'The current value of the post_max_size directive is ' . htmlentities( ini_get_number( 'post_max_size' ) ) . ' bytes. This value needs to be at least equal to the upload_max_size directive value of ' . htmlentities( ini_get_number( 'upload_max_filesize' ) ) . ' bytes.' )
);