I know too few people who take Macs into consideration when designing. (On the other hand, I am too often guilty of paying inadequate attention to details in IE/Windows, an egregious, spiteful oversight.) So for those who aren’t already reading the articles on Apple Developer Connection, you can read it elsewhere: Peter-Paul Koch’s CSS Hints for Internet Explorer 5.

In general, the Mac version of Explorer is more strict in its standards compliance (and supports more of the standards) while the Windows version supports more Microsoft proprietary styles and JScript methods. And the Mac version is way ahead in terms of CSS support. For example, it supports position: fixed, something the Windows browser still hasn’t been able to implement.

The Mac build of IE, like most browsers, has some bugs and idiosyncrasies that can trip up unaware developers.