Hope you don't mind me bolting on a query to your thread but I'm not sure whether I'm setting up my SSL incorrectly or whether it's a bug.
I've added SSL to my portal and enabled SSL on a page used for e-commerce checkout. The problem is that when I navigate back to a page which shouldn't be SSL enabled, the site keeps me in a secure environment. I.e.
Navigate to home - no SSL
Navigate to forums - no SSL
Navigate to checkout - SSL enabled
Navigate back to forums - SSL still enabled
Is this a bug with how DNN switches back to non-SSL pages, or have I failed to set something up correctly?