I installed the latest version of WP-Super-Cache, running on WordPress 2.5 german version. Installation was easy, manually added advanced-cache.php to /wp-content, all caching works well and I can see the folders and files created by WP-Super-Cache.
Only when I create or modify a new page, I get an error at /wp-admin/post.php:
Warning: sem_acquire() [function.sem-acquire]: failed to acquire key 0x152b: Permission denied in /.../wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 106 Warning: sem_release() [function.sem-release]: SysV semaphore 69 (key 0x152b) is not currently acquired in /.../wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 120 Warning: Cannot modify header information - headers already sent by (output started at /.../wp-content/plugins/wp-super-cache/wp-cache-phase2.php:106) in /.../wp-includes/pluggable.php on line 694
Once I reload post.php, all changes appear both in the backend and on the site and it seems that WP-Super-Cache is generating a new version of the cached page.
I have gone through the troubleshooting section of the plugin, but nothing helped me so far. As it will confuse the guys who will need to update the blog i like to know if anybody knows whats happening here.
Cheers and thanks for any suggestions.