Another zero-day exploit can take over your IE
Yet another zero-day emergency patch released by Microsoft http://www.microsoft.com/technet/security/bulletin/ms08-078.mspx following last months equally dangerous vulnerability. Patch it ASAP. This one allows remote execution of code on your machine, and it affects all versions of IE.
This is getting weary. Time for Microsoft to start contemplating IE infrastructure from a security perspective.
Meanwhile, Mac OS users are contemplating whether an AV makes sense for a Mac or not.