Some WordPress mu administrators have reported severe errors after updating to Role Scoper 1.1.

These appear to be caused by Role Scoper’s revised file filtering mechanism, which inserts custom .htaccess directives.  Although designed and tested specifically for WP-mu, these changes have crashed at least two sites.  Since the cause and prevelance of this error is not yet known, I have published Role Scoper 1.1.2, which disables File Filtering by default for new installations, and turns it off for existing WP-mu installations.

If you are already hit by this error, recover by restoring the contents of your .htacess file to .htaccess-dist. Next, turn off File Filtering ( Site Admin > Role Options > File Filtering), or by adding the following line to wp-config.php:

define('DISABLE_ATTACHMENT_FILTERING', true);

By doing so, you will disable Role Scoper’s file attachment filtering feature.

I expect to correct this error once I get some detailed feedback on the WP-mu error condition.  Until then, feel free to turn the feature back on manually and correspond with me on the details of any errors that arise.