I'll mostly be talking about working in Firefox and then "fixing" for IE. Perhaps this is quite unfair, assuming you're working on Windows or a Mac OS, and that the source of all your design woes will (of course) be Microsoft IE's fault. But as I mentioned in Chapter 1, this book is not about only using Firefox! You must check your theme in all browsers and, if possible, other platforms, especially the ones you know your audience uses the most.
I surf with Opera a lot and find that sometimes JavaScripts can "hang" or slow that browser down, so I debug and double-check the scripts for that browser. (We'll discuss more on JavaScripts in Chapter 8.) I'm a freelance designer and find a lot of people who are also in the design field use a Mac OS (like me), and visit my sites using Safari. So, I occasionally take advantage of this and write CSS that cater to the Safari browser. (Safari will interpret some neat CSS 3 properties, which other browsers don't as...