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 IE8….
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.)