BuddyPress.org

I am running wordpress 3.1.3 installed in root directory with buddypress 1.2.8.

I am using Darwin buddypress theme but this is where the error happens

The site itself works fine but when checking the who’s online I notice that quite a few visitors are landing at http://www.maskedmagic.com/wp-content/themes/images/gray-line.gif which brings up an error 404 not found page.

I have checked through file manager and in my theme that image file exists so am a little lost as to what the problem is. I have just tested my site speed through pingdom and it showed it there which is why I know it must be a problem.

I am not very tech savvy but will try to give more details as needed.

Any help will be very much appreciated
Many thanks