[jQuery] Tooltip plugin with a multiple select [IE problem]

[[EMAIL PROTECTED]]

Hi all,
i'm tryin to use the tooltip plugin
http://bassistance.de/jquery-plugins/jquery-plugin-tooltip/
within a multiple select.
My code:

### the select #####

<select multiple="multiple" name="myselect" id="myselect">
        <option value="0">First option</option>
        <option value="1">Second option</option>
</select>

################

####### the jquery code #########

$("#myselect option").each(function(i){
    $(this).attr("title", function() { return $(this).text(); });
    $(this).Tooltip({
        track: true,
        delay: 0,
        showURL: false,
        opacity: 0.90
    });
});

#########################

Please note that the options come without the "title" attribute which
i set via jquery
as the text of the option itself..

The problem occurs in Explorer while in Firefox everything works fine.
I've also discovered that IE doesn't display title tooltips, even with
plain select.
Can  you provide some suggestion to make things work in IE too?
Thank in advance,ralf