Summary:
Fixed an issue where icons for item links not already in the local database were showing blanks.
Cause:
wowhead.com changed the location of all icon images to a static location and did not make public the change. As a result, the item link script was unable to poll the wowhead site for icon names and download local copies of them.
Fix:
The following adjustment was made to the config file:
define('REMOTE_ICON_STORE_PATH', 'http://static.wowhead.com/images/icons/medium/');
Missing icons of current links were manually uploaded to the local server cache and the database was refreshed.