I am using aMember with the Authorize.net AIM plugin. It was working fine, but now it was pointed out that the checkout page is not forcing HTTPS. In fact, I was viewing the site with HTTPS and when I went to the payment page, it was switched to just HTTP. I cannot find a setting anywhere to tell it to force HTTPS. I have created my own membership forms and place the pay systems at the bottom of the page. When I hit submit it actually switches from HTTPS to HTTP. I am using version 4.5.3 of aMember. I know there is an upgrade and will be doing that soon.