Adobe has just patched two bugs in Acrobat reader that could allow a malicious type to take over your computer. You could be affected just be getting a PDF in an email, or by following a link in an email to a PDF file online.
To reduce your risk, update your copy of Acrobat or Acrobat reader as soon as possible and be very cautious with opening PDF files until you have. To update your copy Acrobat reader, head over to the Adobe website.
Franki