IE8 Security Warning (Mixed Mode Prompt) When Editing a Page in SSL

When Editing a Page in Confluence 4.2 (with SSL), the Mixed Mode Security Warning is Prompted:

This behavior will appear when the following conditions are met:

1. The page contains at least 1 macro
2. The Confluence Instance is SSL'ed
3. Server running Confluence 4.2 (4.1 and below are not affected by this)
4. Browser: IE8 (IE9 is not affected)

If the page contains no macros, then the prompt is not there.

Steps to Reproduce

1. Secure Confluence with SSL
2. Navigate to Demonstration Space
3. Edit the Home page of the Demonstration Space
4. Alternatively, create a page with at least 1 macro (any macro, tested with Panel macro, Code macro, TOC macro, etc)
5. Edit the page

Workaround

1. Disable the Mixed Mode prompt by going to (In IE) Tools >> Internet Options >> Security >> Custom Level (for the Internet/Intranet Zone), look for Display mixed content, and set it to Disabled.