[jQuery] load() callback not working, but only on firefox and for one button =/

[jQuery] load() callback not working, but only on firefox and for one button =/


hi,
could someone tel me why my callback function not working in firefox
with my "Strona główna" button on my homepage (http://
warlock24.googlepages.com/index.html#). On IE and opera eveything is
OK. :P
$('div#content_panel').load('./' + page + '.html', null, function() {
    $('div#dialog_loading').hide();
});