This is not a review of Internet Explorer 5.5 - HTML with Style | 7
In addition to the changes in HTML and CSS support, IE5.5/Win has a few other features that have appeared. The most amusing one is, by far, colored scroll bars. Yes that's right, you can now sleep at night as you can change the color of scrollbars on your Web pages and form controls to your liking.
To be perfectly honest, some of these things are way out of my field of expertise, in that they're the kind of thing I check out, learn how to use, and vow never to put on a Web page unless someone asks me very politely while holding a loaded high-caliber weapon to my head. The one thing I can tell you is that all of this stuff is proprietary, IE-only stuff that won't work with anything else and probably never will, so if you want to learn more about them, run over to this article on MSDN Web Workshop and feast on the demos.
The one thing that I will mention here that basically doesn't fit anywhere else is that IE5.5/Win now handles inline frames (the IFRAME element) much better, basically allowing you to use the z-index property to stack them below other elements in your page. This is a welcome (yet minor) improvement in both HTML and CSS support.