From Yahoo Tech:
The major press outlets are abuzz this morning with news of a major new security flaw that affects all versions of Internet Explorer from IE5 to the latest beta of IE8â€¦.
Virtually all security experts (as well as myself) are counseling users to switch to any other web browser — none of the others are affected, including Firefox, Chrome, and Opera — at least for the time being, though Microsoft has stubbornly said it "cannot recommend people switch due to this one flaw." Microsoft adds that it is working on a fix but has offered no ETA on when that might happen. Meanwhile it offers some suggestions for a temporary patch, including setting your Internet security zone settings to "high" and offering some complicated workarounds. (Some reports state, however, that the fixes do not actually work.)