Broken Image Link (Menu)
There should be a small arrow there:



If I had to hazard a guess, I'd say your "CiviCRM Resource URL" may not be set correctly. Check in Administer > System Settings > Resource URLs.

If that URL is correct, check to see if this file exists on your server:
/sites/all/modules/civicrm/packages/jquery/css/images/arrow.png