I created a new installation of WordPress on MP3 Shack.us, and got this error:
Sorry, you need to enable sending referrers for this feature to work.
If you get this error, try turning off Symantec Client Firewall, if you have it:
1. Doubleclick on the globe in the system tray 2. Click on Privacy Control 3. Click on Configure 4. Click on Custom Level 5. Remove the check next to ‘Enable Browser Privacy’ 6. Click OK
Alternatively, edit wp-admin/admin-functions.php and remove these three lines:
$adminurl = strtolower( get_settings(‘siteurl’) ) . ‘/wp-admin’;
$referer = strtolower( $_SERVER['HTTP_REFERER'] );
if ( !strstr($referer, $adminurl) )
die(__(‘Sorry, you need to enable sending referrers for this feature to work.’));
Note that this may reduce security.