I think it's funny everyone is trying Firefox. Secunia specifically states this is an IE exploit. I was mostly being a sh!t, poking fun at the IE zealots.

<soapbox>
Internet Explorer will always be a bigger risk for the unlearned home users who run everything as a priviledged account. Yes, Firefox and the other browsers are at risk too in that setting, but they don't suffer from the further fatal flaw of being embedded into the operating system.
</soapbox>

Seriously, I'm not trying to start an argument or another MS is [better|worse] than open source, and when properly configured IE seems to be just as secure as any other segregated application. But in it's default setting, which is how the majority of people use it, using IE is asking for trouble more so than any other browser.