Broken links to images, admin bar, post body input after 3.2.1 update

I have a subfolder install, which after updating to 3.2.1 has a couple of issues.

First, images are not shown. To specify, images in my root blog are shown, and images put into PageLines are shown too. But both the WP mediatheque (dunno in english, I have a German installation) and in the NextGEN Gallery return a 500 error (internal server error). It’s the domain mapping causing that problem, because if I manually type in the “true” address (with wp-content/blog.dir/ etc.; I’m all default names), the image is found.

Secondly, in the admin area the “new post” page doesn’t display the text input field (it does however display the post title input field), and the admin bar is not shown properly, i.e. instead of horizontally at the top of the page it is shown vertically below everything.

Here’s my .htaccess file:


AddType x-mapp-php5 .php
AddHandler x-mapp-php5 .php

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^[_0-9a-zA-Z-]+/(wp-(content|admin|includes).*) $1 [L]
RewriteRule ^[_0-9a-zA-Z-]+/(.*\.php)$ $1 [L]
RewriteRule . index.php [L]

The multisite installation is strictly along the codex tutorial and Otto’s tutorial, and everything worked fine with 3.1.x. I replaced all files but .htaccess and wp-config.php manually, I turned off all plugins and on again. I have a “managed server” with no full access, thus no info on AllowOverride = All or jquery version, but, as I said, everything worked just fine with 3.1. MySQL 5.0, php