http://www.microsoft.com/technet/security/advisory/925984.mspxWhat's it's about: Vulnerability in PowerPoint Could Allow Remote Code Execution
same as last month.
Versions affected: PowerPoint 2000, PowerPoint 2002, PowerPoint 2003, PowerPoint 2004 for Mac, PowerPoint v. X for Mac
No patch is available yet.
Same precautions applied. Do not open anything from unknown sources. Even if you know, do be careful.
Another way would be to open the PowerPoint file in PowerPoint Viewer.
http://www.microsoft.com/downloads/details.aspx?familyid=428d5727-43ab-4f24-90b7-a94784af71a4&displaylang=enMac users take note. You too are affected. If you are not using Microsoft products, then skip this.