Microsoft has finally updated Internet Explorer and with it the way it treats items it views suspiciously – in particular my ActiveX control I am working on. This update not only affects IE7 but also IE6 which I have running side-by-side on my system.

What makes this update note-worthy? If you set the Security Options set to ‘lowest’ for the trusted sites and set the all the ‘prompt’s to ‘enable’ you still get asked if you would like to run the ActiveX control. Twice. It also downloads the ActiveX control. Twice. That’s 1.8mb total for the ActiveX control instead of 900kb and twice as long to initialise.

It probably has something to do with the authentication routine (you are challenged when you try to access the page with the control on it) but before IE7 was released the prompt and the download only occurred after you were challenged.