This may be somewhat of a silly question. When I am trying to preview a post the LaTeX graphics never show up. It just says that it is being generated, and to reload the page in a moment. The problem is it never shows up. Is there always a huge lag on this, or am I doing something wrong? I even tried to cut and paste the code from valid graphics, just to make sure the lag wasn’t due some code error. Anyway, I'm new here so some feed back on this would be much appreciated. Thank you.