A profoundly irritating iteration of the browser, given that it indents the first line of each Everything2 nodelet when the page is rendered. It also broke some things that worked properly in previous releases, still isn't compliant with HTML 4.0 or CSS2, and is incompatible with Internet Explorer 5 for the Macintosh, which is a neat trick.
And IE 5.5 can apparently popup HTML outside the browser window, wherever the author likes on your screen. This is beyond the pop-up window. Gah!
Quoth webreference.com: "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."