Content disappeared for authenticated users Suddenly, I have encountered a weird problem. I see my site flawlessly as admin and unauthenticated users. But all the timestamp-based content (Like blocks-forum thread etc.) disappear when I log in as a (non-admin) user. 

I have checked server's time and truncated session table and flushed all cache but the problem persists. Really appreciate your hints.
Go to admin/user/permissions and then tick the check-box for authenticated users under  access content and then click save.