http://blogs.adobe.com/psirt/2009/12/new_adobe_reader_and_acrobat_v.html

This
afternoon, Adobe received reports of a vulnerability in Adobe Reader
and Acrobat 9.2 and earlier versions being exploited in the wild
(CVE-2009-4324). We are currently investigating this issue and
assessing the risk to our customers. We will provide an update as soon
as we have more information. Please continue monitoring the Adobe PSIRT blog for the latest information.

Update
http://www.computerworld.com/s/article/9142388/Adobe_won_t_patch_latest_PDF_zero_day_until_Jan._12

Adobe won’t patch latest PDF zero-day until Jan. 12

Public exploit already available, portends widespread attacks soon