There was a brief moment in time where IE 5 for Mac had the best CSS support of any browser on any platform (IE on Windows was a completely different engine).

There was a brief moment in time where IE 5 for Mac had the best CSS support of any browser on any platform (IE on Windows was a completely different engine). However part of being on the bleeding edge was that when development stagnated it had the weirdest bugs that we had to deal with for years.