Frequent HTTP/HTTPS security warning popups on IE 7/8

When using Crucible, there are frequent HTTP/HTTPS security warning popups on IE 7 and IE 8, making for a fairly disruptive user experience.

e.g. Warnings are displayed when the user...

• Views a Review: https://atlaseye-qa.atlassian.com/atlaseye/cru/CR-JRA-161
• Creates a Review: Tools->Create Review->Bamboo->Create Review
• Mouses over a Review Link in the Dashboard: Dashboard->Activity->All Activity->Mouse over any review link.