Trojans via image files

I've seen some skanky looking people in my time, and it's nice to know that I can't catch anything just by looking at them. But now it appears that thanks to a flaw in some versions of Windows, viewing the wrong pictures could catch you a Trojan:

"Internet watchers say they've spotted infected images that could implant a back door into a Windows computer if they are viewed.
EasyNews, a provider of Usenet newsgroups, said it has identified two JPEG images that take advantage of a previously identified flaw in the way Microsoft software handles graphics files. Windows users could have their computers infected merely by opening one of those Trojan horse images. "

This may or may not apply to you, and other safeguards might prevent problems in any case. Follow the link for more details.