Well, to test in Internet Explorer of course! I'm a front-end engineer for Yahoo!, and unfortunately a stupidly high number of our users are IE users. There are

Well, to test in Internet Explorer of course! I'm a front-end engineer for Yahoo!, and unfortunately a stupidly high number of our users are IE users. There are options on other operating systems like Parallels and WINE, but nothing gets the job done like the real thing.