[Daniel]

PLEASE PLEASE PLEASE do this on a test template first to make sure it works for you...

In the navbar template, cut and copy this code and add it to the very top of the header template.

<vb:if condition="$show['notices'] AND THIS_SCRIPT != 'register'">
    <form action="profile.php?do=dismissnotice" method="post" id="notices" class="notices">
        <input type="hidden" name="do" value="dismissnotice" />
        <input type="hidden" name="s" value="{vb:raw session.sessionurl}" />
        <input type="hidden" name="securitytoken" value="{vb:raw bbuserinfo.securitytoken}" />
        <input type="hidden" id="dismiss_notice_hidden" name="dismiss_noticeid" value="" />
        <input type="hidden" name="url" value="{vb:raw return_link}" />
        <ol>
            {vb:raw notices}
        </ol>
    </form>
</vb:if>

Test the demo above, but to expand the width even more, in stylevars find "doc_Width" under 'Global'
change the units to % and size to 100.
If nothing happens then do the same to doc_maxWidth under the 'Global' category

Let me know if that works out.