For quite a while now, I've had this problem and I haven't been able to find a solution for it. Only on firefox (doesn't happen on Chrome or IE, just checked), Wikipedia has for the last year or so displayed the page's title in similar ways to the screen shot above. Sometimes it says <i>Title</i>, sometimes span instead of i, but it almost never (or maybe just never) just displays the title by itself, strangely enough.
I have looked but haven't seen anybody else experiencing the same problem. It's a pretty weird problem. What do?