Using ClamAV? Update Now
ClamAV is a popular open source anti-virus engine, that among other things, is popularly used to scan emails on Linux/Unix systems for bad stuff. There's talk of a vulnerability out there relating to PDFs (source in German, but Google translate worked well) and users are advised to update to the latest version. I recommend reading the ClamAV-Users mailing list to figure out what's up with that latest version; it sounds like there is some confusion or a potential issue -- some users are attempting to download the latest 0.99.3 version but are getting beta code, not final production code. It's all a bit confusing and I'm hoping that admins running ClamAV will be able to decipher it all a bit better than I'm able to from afar.