Geeks, please help! (schon wieder)

Ich erhalte gerade eine Nachricht, dass mein Blog Kommentare nicht durchlässt, und zwar mit folgender Meldung:

Precondition Failed

We’re sorry, but we could not fulfill your request for /wp-comments-post.php on this server.

We have established rules for access to this server, and any person or robot that violates these rules will be unable to access this site.

To resolve this problem, please try the following steps:

- Ensure that your computer is free of viruses, Trojan horses, spyware or any other sort of malicious software. - If you are using any sort of personal firewall or browser privacy software, check to ensure that its settings do not cause your web browser to inadvertently violate any kind of the rules listed below. - If your are behind a Web proxy or corporate firewall, the proxy must conform to the HTTP specification with respect to proxy servers. Contact your network admministrator if the trouble persists, or bypass the proxy and connect directly if possible. - Disable any download accelerators you may be using. They don’t speed up your downloads anyway, in most cases, the actually run slower! - If all else fails, try using a different Web browser, such as firefox

If you still need assistance, please contact [*******@ra-blog.de]

(…)

Wie ich höre, nützt es nichts, es mit Firefox zu versuchen. Jemand eine Idee?