Funny story from beginning: 1. I have threads and posts with extended links. 2. If i add a new post with a link to such a thread, i can see the extended link after sending the post by quick sending. 3. After a refresh the extended link and ALL OTHER extended links in the thread above are away. 4. If i delete the last post, i can see all the extended posts again. Conclusion: With addong a new link, i do something special, so none of the old neither the new link are shown as extended links.