Focus loop override in modal dialogs not working in non-Gecko browsers

The dialog module has this code to override the browser focus loop:

// prevent tabbing out of modal dialogs

if (options.modal) {

uiDialog.bind('keypress.ui-dialog', function(event) {

if (event.keyCode !== $.ui.keyCode.TAB) {

return;

}

var tabbables = $(':tabbable', this),

first = tabbables.filter(':first'),

last = tabbables.filter(':last');

if (event.target === last[0] && !event.shiftKey) {

first.focus(1);

return false;

} else if (event.target === first[0] && event.shiftKey) {

last.focus(1);

return false;

}

However, I have found that Safari 5 and IE 8 do not run this handler when TAB is pressed. It is, however, run when normal printable characters are entered in input fields, etc.

Perhaps the devs can investigate a workaround using keydown for the affected browsers...?