Symantec distributed some research this week showing that 22 vulnerabilities were reported for Safari in 2007, compared with 88 in Mozilla browsers like Firefox, 18 in Internet Explorer, and 12 in Opera. It should be noted that counting the vulnerabilities is not the best way to measure the security of a piece of software, and can be explained in part by increased interest on the part of security researchers in investigating Firefox and Safari as they become more widely used.
That means it’s no longer about Windows vs. Mac OS (at least when it comes to security debates-don’t worry, fanboys). It’s about Internet Explorer vs. Firefox vs. Safari vs. Opera.