mashu

I also thank you very much douglaseberger. It was User Access Manager in deed that caused this. It’s even specified in the description of this plugin in the Manage Plugins page. It says:

Note: If you activate the plugin your upload dir will protect by a ‘.htaccess’ with a random password and all old media files insert in a previous post/page will not work anymore. You have to update your posts/pages. If you use already a ‘.htaccess’ file to protect your files the plugin will overwrite the ‘.htaccess’. You can disabel the file locking and set up an other password for the ‘.htaccess’ file at the UAM setting page.

By the way, did any of you find a better plugin to restrict certain category posts only for registered users? I want that any visitor, when they go to a specific category page to be able to see the posts titles and maybe their excerpts or the text before the more tag, but to ask them to login or register if they want to see the whole post.