In this line t =

teammatt3 — Tue, 11 May 2010 02:08:00 +0000

In this line
t = setTimeout(function(){$(this.nextSibling).fadeIn("slow")},1000);
"this" refers to the global object (the window). You need something like

      $(titleWrap).hover(
          function(){
           var that = this; // keep a reference to 'this' since you lose it in the setTimeout callback
           t = setTimeout(function(){$(that.nextSibling).fadeIn("slow")},1000);
          },
          function(){
            clearTimeout(t);
          }
        );