From eweek :Unpatched IE Flaw Is Worse Than Expected - I do apologize for it being quite technical.
One of the reasons I have the get Firefox link on oasismag, is because it's very very dangerous to use
internet explorer on the web these days. It has enough security holes that it allows any malicious
developer to format your hard drive using nothing more than a pop-up. And you know how rife those are.
They don't want to destroy your machine though, they'd rather install spyware, and applications
that turn your computer into a spam zombie.. forwarding thousands of mails for herbal
viagra or nigerian princes.. and generally making the internet a less pleasant place for everyone.
If you use internet explorer, and you notice your machine gets unstable and slow over time, it's very likely that it's because of the spyware infections you have gotten from using IE.
If you absolutely totally have to use internet explorer, and refuse to switch to Firefox or Opera, please make sure your pc has all the latest patches applied, although in the case of this flaw.. it won't help anything.