с 6.16 тоже самое, делаю по guide, что на drupal.org и в итоге после нажатия install Drupal in English получаю:
An error occurred. http://syw.wronglink.ru/install.php?locale=en&profile=default&id=1&op=do
Fatal error: Out of memory (allocated 6553600) (tried to allocate 35 bytes) in /var/www/includes/install.inc on line 43

Configuration
PHP Core
Directive Local Value Master Value
allow_call_time_pass_reference On On
allow_url_fopen On On
allow_url_include Off Off
always_populate_raw_post_data Off Off
arg_separator.input & &
arg_separator.output & &
asp_tags Off Off
auto_append_file no value no value
auto_globals_jit On On
auto_prepend_file no value no value
browscap no value no value
default_charset no value no value
default_mimetype text/html text/html