This could be a style problem, let me describe what I see and what I expect. I include a URI with inclusion syntax {{Waga}} or {{Wikirate}} down the page a bit on this card: http://gerry.wagn.org/Ceptr_Cards
What it seems to be doing is ending the paragraph (<p> tag), before th inclusion. The inclusion starts with a <div> tag, but that should be ok inside the <p>, right? I'm not sure I can tell if there is a real close </p> before the div. There isn't one at the 2nd inclusion, that looks normal.
Most of the time when I ask a question like this, I've pasted in some markup, but I don't see any of that here..
Didn't realize I wasn't logged in.