It has come to my attention lately that there are some Mac users around campus who are still using Internet Explorer. It came to my attention because there were problems with some our sites displaying in IE. I recommended that people swap to Firefox or Safari (my preference for the Mac). There is a very simple reason for this: Microsoft have stopped all development on the Mac verison of IE. The number of web sites that don't work in Mac IE is only going to increase as the browser is not being updated for advances in web technology.
So, even though it surprises me that I have to persuade Mac users to dump IE, and even though I know browser choice around the Uni is sometimes a HIGHLY personal thing, make the switch and you'll be pleasantly surprised.