If you use an OS 10.3 Mac with Safari or MSIE, you absolutely must follow the instructions in this post to block a really serious attack that Apple hasn't patched (though they've reportedly known about this since February). Alternatively, you could always run Mozilla or one of its variants — a free, open source browser in which vulnerabilities are corrected as soon as they're discovered (not when Apple decides to get around to it). I stand corrected — this effects Mozilla, too.
(via Electrolite)
