[jQuery] chaining question

[bleen]

If the function below (which is called in a mouseover event) is run
too many times, too quickly it doesn't work (i.e. the html in question
is not changed)

function loadedContentProcess(tab,result){
        content[tab] = result;
        $
("#popular_quicksearch_content").hide().html(content[tab]).fadeIn("slow");
}

However if I change the function this (below) it works great not
matter how many times (and how quickly) it is called. Why?

function loadedContentProcess(tab,result){
        content[tab] = result;
        $("#popular_quicksearch_content").hide();
        $("#popular_quicksearch_content").html(content[tab]).fadeIn("slow");
}

--
Alex