I have always found those little preview things on WordPress highly annoying – especially when you are trying to copy a link, or trying to read something. They were fun for about 5 minutes, then they became something I hated with a passion. Then, like most people in an abusive relationship, I learned to live with them and pretend that I could live with the annoyance. But now, thanks to Greg Laden, I can turn them off. Forever! (or at least until the next “improvement”).
Lorelle on WordPress has instructions for how to turn them off on your blog.