It started last Thursday. Suddenly any post or chat message containing the string "laut.fm" would be blocked with the following error message:

  You can't post this because it has a blocked link
  The content you're trying to share includes a link that our security systems detected to be unsafe:

  laut.fm

  Please remove this link to continue.

  If you think you're seeing this by mistake, please let us know.

We have no further information about what might be offending facebook. Our site is pure organic user generated content. We don't do any special SEO tricks.

We and several of our users reported the blockage via the link provided in the error message to no avail. We reported an issue with our facebook page here: https://www.facebook.com/help/contact/164405897002583?rdrhc . When trying to debug the issue via the facebook debugger (https://developers.facebook.com/tools/debug/og/object?q=http%3A%2F%2Flaut.fm) one gets the error message "Failed to get composer template data.". Using a link shortener to post laut.fm links won't work either. I worked through the points on this list: http://stackoverflow.com/questions/13185406/facebook-wont-share-a-link-to-my-site without success.

The most frustrating part is not even being blocked, but being left in the dark about the reasons.

We are out of ideas. I use this HN post as a last resort. Any help or hint on how to proceed would be highly appreciated.

Niko.