Find this at the bottom of your page and remove the arrow next to this </td> --> in your code.
<!-- <td width="11"><img src="images/bg-bar-r2.gif" width="10" height="40"></td> -->
<td width="10"> </td>
It looks to me like this is a page generated by a content manager so you may have to find the part in one of the templates associated with this area of your page to remove it permanently.
These comment tags <!-- comment --> come in pairs so if there is one arrow not paired off it will show in your page just like you have showing now. It may take some finding if it is in your templates but find it you must.