Wordpress errors
From KOP KB
Redeclare get_temp_dir() error
Error: Fatal Error: Cannot redeclare get_temp_dir() (previously declared in /home/public_html/wp-includes/functions.php:2160) in /home/public_html/wp-admin/includes/file.php on line 189
Solution: Reinstall all WP core files. To keep the plugins, themes and content. Just deleted WP-Admin and uploaded the fresh version and the same for the functions.php.
Blank Page
If you see a blank page it could be because the installer had wrong info or something is missing in htacces, this default htaccess could also help with people logging and wp permalinks working correctly
WP-config Editing
Default Htaccess
make sure the following is in the htaccess file in the same folder as the folder with wordpress in it.
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress