True, but there is gabbr.gif in the zip.
There was an error in the code, the correct code should be:
<a href="http://www.gabbr.com/submit.php?url={VIVVO_URL}index.php?news={article. get_id}" target="_blank"><img src="{VIVVO_THEME}img/gabbr.gif" alt="Add to gabbr" border="0" /> gabbr</a>