JohnnyDuke

Hey Mika, thanks for the quick reply. Yes, i know it isn’t, but my english isn’t good ??

I’ve just find the answer to my problem. ??

I disabled all the plugins and theme and the problem persisted so i searched more I’ve found this:

Issues with old WPMU installs

If you installed WordPress MU in subfolder/subdirectory (not in root folder on your server >via ftp) and you have problem with image library, where thumbnails and images do not show, >you may need to manually add in rewrite rules for your file directories as follows:

RewriteRule ^([_0-9a-zA-Z-]+/)?siteN/files/(.+) wp-content/blogs.dir/N/files/$2 [L]
Put those below the normal call for uploaded files.

However, this didn’t work, i had to replace (or comment) the uploaded files line and change the new one. In the end this is the .htaccess that worked OK for me:

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

Being ‘N’ the number of my non-primary site

So, I guess that for each site, you have to add another line changing the number. Again, I’m not shure it works with more sites.

Hope this helps

I’m having the same problem, a few weeks ago, the non-primary wp site started to show only broken images, i’ve opened a ticket here:
https://wordpress.stackexchange.com/questions/73783/broken-image-multisite

I think it must be a host problem, but i’m running out of ideas…