Recently you may have noticed a new repetitive security warning in Internet Explorer 8. The feature is to protect internet users from non secure content while browsing a secure site. Some secure sites link content, images and advertisements that are not delivered securely. This could have ramifications if someone thought they were on a secure site and entered in sensitive data that was not encrypted. The truth is the warnings are so prolific that they almost defeat the purpose they intended. To be safe I recommend choosing the setting to disable the non secure content which is the selection I make in this video.
Another Youtube how to video from Managed Solutions: