[oldz442]

Went a bit further and bottom aligned 'edited by', 'signature' and the 'likebox thanks hack'. Some pics and CSS below. There is more CSS tweak stuff... margin, padding, etc.

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additional.css
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.top-align { vertical-align: top; }
.bottom-align { vertical-align: bottom; }
.postbitlegacy .postbody { margin: 0 !important; }
.postbitlegacy .postrow.has_after_content { padding-bottom: 0em !important; }

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postbit_legacy
---------------

<div class="postdetails">
  <table style="width:100%">
    <tr>
      <td rowspan="2" class="top-align">
        <div class="userinfo">
          LEFT-USERINFO-BOX
        </div>
      </td> 
      <td class="top-align">
       <div class="postbody">
         CONTENT
       </div>
      </td>
    </tr>
    <tr>
      <td class="bottom-align">
        LASTEDIT / SIGNATURE / LIKEBOX
      </td>
    </tr>
  </table>
</div>