jQuery Forum

Hi,
i found that using puff effect intbs contest produces an error:
"jQuery.easing[this.options.easing || (jQuery.easing.swing ? "swing" :
"linear")] is not a function"
The code is:
var data = new Object();
data.act = 'ft_check_uploaded';
$.post("core.php", {act:"ft_check_uploaded"}, function(data){ if
(data.sayok)
    {
    $("img#foto_anteprima").attr({ src: "../db/photos/thumbs/" +
data.foto_nomefile, title: data.foto_didascalia,
        alt: data.foto_didascalia });
    $("span#foto_didascalia").attr({ value: data.foto_didascalia });
    $("div#form_foto").hide("puff", {}, 1000)
    setTimeout(function() { $("div#anteprima").puff("slow"); },500);
    } }, "json");
This works (and it's cool) outside a tabs.ui contest; in add, if I
change:
$("div#form_foto").hide("puff", {}, 1000)
to
$("div#form_foto").fadeOut("slow");
works too, so the problem is interaction between puff and tabs.ui, I
suppose.
Any suggestions about?