I installed my first multi-site here:
http://eric.mystavash.net
(it's for my brother! He likes dragons so much he has 4 of them tattooed on himself. ^.^ I dunno whether he will use it or like it, but it's something to do.)
multisite wise, it's OK. But I keep running into problems with the theme not showing up where it should.
I think this is more the theme than Drupal, it's a port, so I have been fixing things here and there. Turned it into a table to get the dragon to show up properly.
However, when I turned on clean urls, the theme disappeared from the admin pages. mysite.net/admin was OK, but anything else, like the module page, and it went away.
I am thinking maaaaaaaybe it's in here from the page.tpl.php:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1" />
<meta name="author" content="Original design: Andreas Viklund - http://andreasviklund.com/" />
<?php #echo $styles; ?>
<?php echo $head; ?>
<link rel="stylesheet" type="text/css" href="<?php echo $directory; ?>/andreas05-alternate.css" />
<title><?php echo $head_title; ?></title>
<?php echo $head; ?>
</head>
but it's only the admin pages and only with clean urls.
sigh.
And yes, base url is ok, theme default is set. etc etc.