I tried updating the system from 1.7.1 to 1.7.3 and was wondering why the upgrade script throws errors. Is it possible that there are no chances on the database?

Thanks for a answere :)

@blackandcold  There are changes to the database.  If you're having problems upgrading, please make sure you're following the installation instructions carefully.  If there are still problems, please open a new thread with information about the errors you're getting, any 3rd party plugins installed, and any core modifications you've made. 

Will the 1.8 version be coming out soon?? I really liked how that demo worked. I like how it looks better then what the current version is. Anyone know when it will come out?

Not for a while: Trac has over 400 open issues for 1.8.

That is a few open issues there. Can't wait until it comes out

Which file on the download has the specific details to upgrade from 1.7.1 to 1.7.3?

Some edits in .htaccess? Where is this info!

UPGRADE.txt

Here is a copy of upgrade.txt. What is it telling me to do?

<?php
/**
 * Elgg upgrade script.
 *
 * This script triggers any upgrades necessary, ensuring that upgrades are triggered deliberately by a single
 * user.
 *
 * @package Elgg
 * @subpackage Core
 * @author Curverider Ltd
 * @link http://elgg.org/
 */

// Include elgg engine
define('upgrading','upgrading');
define('externalpage',true);
require_once(dirname(__FILE__) . "/engine/start.php");

if (get_input('upgrade') == 'upgrade') {
    if (version_upgrade_check()) {
        version_upgrade();
    }
    elgg_view_regenerate_simplecache();
    elgg_filepath_cache_reset();
} else {
    global $CONFIG;
    echo elgg_view('settings/upgrading');
    exit;
}

I need instructions like I am building a model airplane. Do kids still do that stuff?

You want the text file, not the php file: http://code.elgg.org/elgg/branches/1.7/UPGRADE.txt

The changes to the .htaccess file are the

&%{QUERY_STRING}

added to some of the rewrite rules. Just compare the new htaccess_dist to your current .htaccess