form becomes inaccesible when select tag is empty and has size property greater than 1

when reading form that has a select tag empty and has size property greater than 1*, all the form becomes inaccessible. In some cases components are not read or are related to wrong labels.
*like:
<select id="test1" size="4">

</select>

See the atachment, read with orca, press tab to go to the components.
Firefox 7.0.1, Ubuntu 11.10