What does this have to do with the URL scheme though? With or without it, secure pages can embed links to other secure pages on other domains. Whether the protocol is explicit in the markup does not change the browsers ability to mix content from multiple secure domains.
I was asking a separate question, making a separate comment. Sorry if it seems too far off from the original article's topic, but cninja seems to have a lot of background in this area. I though that if he or another chose to respond again, it might clarify things for me, and maybe some other readers.
Perhaps I should have waited before responding; I'm (still) feeling kind of off, today. Apologies to anyone annoyed by my contributions here.
