In the Navbar template somewhere around:
Code:
<td class="smallfont" nowrap="nowrap"><label for="cb_cookieuser_navbar"><input type="checkbox" name="cookieuser" value="1" tabindex="103" id="cb_cookieuser_navbar" accesskey="c" />$vbphrase[remember_me]</label></td>
That would be my best guess. I don't have a default vB style installed so I can't check it, but that's roughly in the same area.