UPDATE:: Green / Landing Pages on Secure sites are unable to access images and css files / E9 Custom
This issue has been resolved.
The fix for this issue has just passed code review in development and we are targeting getting this patched to production shortly.
Secure landing pages that are using the https://img.en25.com domain to access files and images cannot access them due to the lack of a certificate. There are approximately 30 customers with secure hypersites but not all of them are configured to use this domain. Timeframe for initial resolution is a hot fix targeted for shortly after noon. Immediate fix is to manually change img.en25.com references to https://secure.eloqua.com or https://static.eloqua.com. Updates will be forthcoming.