"Dell may have picked the perfect time to begin offering Linux-powered desktops. Why? Because, the next generation of Windows, Vista, has just sprung its first major security leak: the .ANI vulnerability.
"'ANI' stands for Animated Cursor Image format. When any version of Windows from NT to Vista opens up a corrupt ANI file with USER32.DLL, the program that loads ANIs, you've just turned your computer over to the malware's author. You can be smacked by it by opening a Web page or HTML email message that's been loaded with an ANI attack..."