World: r3wp

http://www.dobeash.com/rebgui.html

No, I mean that: pressing CTRL+S on a field, RebGUI make he spellcheck 
of that field, but you must download  your language dicctionary from 
http://www.dobeash.com/RebGUI/dictionary/
Did somebody move that page?

A dictionary is just a series of words. You can make your own

Odd, the directory has 755 so should be readable ... anyway the files 
can be accessed directly:

	http://www.dobeash.com/RebGUI/dictionary/American.zip

and:

	British.zip
	Czech.zip
	Dansk.zip
	Deutsch.zip
	Espanol.zip
	Francais.zip
	Italian.zip

Does it have an index.html? Does the web server redirect to it?

Didn't require one in the past, server config has probably changed.

You can create the following file index.html:
<?php
  function getDirectoryList ($directory) 
  {
    // create an array to hold directory list
    $results = array();
    // create a handler for the directory
    $handler = opendir($directory);
    // open directory and walk through the filenames
    while ($file = readdir($handler)) {

      // if file isn't this directory or its parent, add it to the results
      if ($file != "." && $file != "..") {
        $results[] = $file;
      }
    }
    // tidy up: close the handler
    closedir($handler);
    // done!
    return $results;
  }
?>

Or better:

<?

$path = ".";
$dir_handle = @opendir($path) or die("Error opening $path");
echo "Directory content: <br/>";
while ($file = readdir($dir_handle))
{
if($file!="." && $file!="..")
echo "<a href='$file'>$file</a><br/>";
}
closedir($dir_handle);
?>

Or just enable Indexes in apache.

... if you have control over that ;)

most of the times, you can put that in a .htaccess file.