I have upgraded from WordPress-MU 2.8.4 to WordPress 3.0.3 via 2.9.2, and as instructed changed the line from
RewriteRule ^(.*/)?files/(.*) wp-content/blogs.php?file=$2 [L]
RewriteRule ^(.*/)?files/(.*) wp-includes/ms-files.php?file=$2 [L]
in the .htaccess file
If I follow strictly the instructions and get rid of the wp-content/blogs.php file, all the sites have broken links to the media files they are using, whereas if I don't delete the file, the links are fully functional. There must be something in blogs.php that is necessary to the system, but I can't figure out what.
I would be grateful to read from someone who could show me the way to get this right.