Is this an IE bug or am I doing smtg wrong?

Is this an IE bug or am I doing smtg wrong?

Hi everyone
I am devolipng a site and I was using firefox and everything was ok. Now I tried the site with Chrome and IE. Chrome is ok too but IE show some weird behaviour.
demo002.desentaki.com
this is the site. Try hovering on the leaves with small images on. Even if I hold mouse still it hovers in and out.
This is the code I use for hover effect:

        jQuery(".link1").hover(
            function() {
                jQuery(".bg_image_link1").show();
                jQuery(".bubble-left-1").fadeIn(100);
            },
            function() {
                jQuery(".bg_image_link1").hide();
                jQuery(".bubbles").hide();
            }
        );

If you need any other details please ask.
Thanks for your time.