The Irrlicht homepage got hacked last weekend. A backdoor was installed in our wordpress installation and invisible spam-links got added all over the place. This was possible as we hadn’t updated our WordPress installation for too long. Most things are now back in place. But we will no longer allow comments on posts (we have the forum for that) and we no longer support IRC chatting over the homepage (please use IRC clients for that instead).
The attackers likely got access to the database which is also used for the forums. So please update your forum password.