Blog pages render without CSS when browsing to the site using HTTPS

[jeremy-jameson]

Using HTTPS, browse to a Subtext blog page in which the skin specifies an absolute URL for the CSS file using HTTP (e.g. http://www.technologytoolbox.com/Themes/Theme-1.0/Theme-1.0.5.min.css). In this scenario, Firefox (6.0.2) renders the page as expected, but Internet Explorer 9 does not (it renders without CSS and displays a warning - "Only secure content is displayed" -- along with a button to "Show all content").

Ideally, the CSS file could be specifed using a server-relative URL (e.g. "/Themes/Theme-1.0/Theme-1.0.5.min.css") but this doesn't currently work in Subtext 2.5).

Workaround:

Specify an absolute URL for the CSS file using HTTPS (e.g. https://www.technologytoolbox.com/Themes/Theme-1.0/Theme-1.0.5.min.css).