Q: I've made a post as a guest, but it's not in the list of topics/replies... What's wrong?
A: Everything's fine, your post has been successfuly submitted, no worries. The software the site runs on is designed in a way that there's a delay (up to a few minutes) before new content is shown to guest visitors.
Q: I'm trying to put a link in my post, but it won't automatically convert into an image/YouTube video, what do I do?
A: Just reload the page and reinsert your link, it should be OK now.