Network admin link broken (wordpress own directory)

Hi,
While updating wordpress 3 to 3.3.2, I discovered a little problem with my WordPress (own directory setup) multisite.

The links to network admin aren’t working.
The WordPress setup is simple : /wordpress/BLOG-SLUG
The “broken” links are, for exemple :
/wp-admin/network/sites.php in the admin (the good link is supposed to be /wordpress/wp-admin/network/sites.php?)

The related problem is that wordpress/wp-admin/network/sites.php doesn’t work too… It’s redirected to /wp-admin/network/sites.php

So it’s seem a config problem + there is a rewrite/redirection made.

This problem isn’t appening in wordpress 3.0
The blog was a MU before updating to 3.0 then to 3.3.2

HTACCESS  :
RewriteEngine On
RewriteBase /wordpress/

#uploaded files
RewriteRule ^(.*/)?files/$ index.php [L]
RewriteCond %{REQUEST_URI} !.*wp-content/plugins.*
RewriteRule ^(.*/)?files/(.*) wp-includes/ms-files.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteCond %{REQUEST_URI} ^.*/wp-admin$
RewriteRule ^(.+)$ $1/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule . - [L]
RewriteRule  ^([_0-9a-zA-Z-]+/)?(wp-.*) $2 [L]
RewriteRule  ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]

<IfModule mod_security.c>
<Files async-upload.php>
SecFilterEngine Off
SecFilterScanPOST Off
</Files>
</IfModule>

WP-CONFIG :
[…]

/** The Database Collate type. Don't change this if in doubt. */
define('DB_COLLATE', '');
define('VHOST', 'no');
$base = '/';
define('DOMAIN_CURRENT_SITE', 'www.acelf.ca' );
define('PATH_CURRENT_SITE', '/' );
define('SITE_ID_CURRENT_SITE', 1);
define('BLOGID_CURRENT_SITE', '1' );

[...]

define( "WP_USE_MULTIPLE_DB", false );
define('WP_ALLOW_MULTISITE', true);

WEBSITE :
http://www.acelf.ca/wordpress/ (wordpress)
http://www.acelf.ca/nouvelles/ (BLOG)

Thanks!