Unnecessary image superimposing image header

Hi,

If you’d go to this link: http://easysmallbusinesshr.com/2011/09/managing-diversity-in-the-workplace-a-supervisors-guide/

You can see a small image superimposing the image header. That image used to be a part of the opt in box on the sidebar but yesterday I noticed that the image was missing; only to discover later that it has moved up there. I don’t know what happened. I did not update any plugin nor did I update the WP version. Can someone please tell me how to remove it or at least bring it back to its original place on the sidebar.

All I know was that the person who designed it (who I can’t contact anymore) used some div class coding of some sort to put that image in the sidebar.

Thanks in advance for all your help. 🙂