IE7 disappearing float bug (Obsolete)
In IE7, the exact wrong combination of floats and italics can make a floated element disappear.
On Broken HTMLFrom time to time the idea is put forth that less common browsers need to start dealing with bad code. There are two problems with that view.
Pure CSS ButtonsAs part of a minor site optimizing kick, I replaced the validation labels with something smaller, less obtrusive, and directly on the page. I tried to duplicate the look of the classic antipixel-style buttons in CSS.
Simple Browser Categorization (Obsolete)
Sometimes you want to know exactly what software people (or bots) are using to view your website. Sometimes all you want to know is which rendering engine’s quirks you need to cater to.
Web Design is Like PizzaA lot of pages aren’t as specific as the authors think they are. When you write code and test it on only one browser, you’re not testing that the code is correct, you’re testing that that browser makes the same assumptions you do.
Webslices and Microsummaries (Obsolete)
Both features have since been removed, but they offered and interesting way to let visitors know when a site had been updated.