This is happened twice so far, once in the forums and now currently in the official form and list module. If you look at the page here and hover or click over the links they bring you right back to that page, Rather then going to white-wolf.com or whatever the link addy is.

This also happened in my forum once in a post with a hyperlink in it. But seemed to be a isolated incident. However seems to be popping up in other places too now. Is this a bug in the current DNN?

Actually, just seen your reference to the core Form & List module. Never used it before so thought I would test it out to see how it functions when entering hyperlinks. Set up a new list, added a new column as a URL, added a URL to the list and all is working. Doesn't need the usual display text entry as in the links module or when using HTML. If that's what you're doing, I'm not sure what's happening..