Foxit is a good alternative to use for win/linux users until Adobe get this sorted http://www.foxitsoftware.com/ (8Mb istalled Vs Adobe's 220Mb - no need for the pro version, the free reader works well) http://en.wikipedia.org/wiki/Foxit "February 20, 2009 6:13 AM PST Adobe warns of critical, unpatched security flaw by Dawn Kawamoto Attackers are making the rounds and exploiting a critical security flaw in Adobe Reader 9 and Acrobat 9. Earlier versions of the PDF-related software are also affected by the critical security flaw, which could cause the applications to crash and potentially let an attacker gain control of a person's computer, Adobe Systems warned Thursday. Reports also surfaced that attackers have developed an exploit and are taking advantage of the flaw, the company said. Adobe has yet to develop an update to address the vulnerability but noted it expects to have one ready for Adobe Reader 9 and Acrobat 9 by March 11. After that, the company expects to launch updates for the earlier versions of the software going back to Adobe Reader 7 and Acrobat 7. Until then, Adobe advises, people should update their virus definitions and exercise caution when opening documents from unknown sources. Security company McAfee noted in a blog that the current attacks appear to be targeted ones but that it expects new variants of the exploit to make the rounds as more information becomes public. In its posting, McAfee said that malicious PDF documents began to surface at the start of the year, exploiting a vulnerability in Adobe Reader versions 8 and 9. The attackers can then take advantage of a bug in Reader to overwrite memory and gain control of executing code. After that, attackers can install a Trojan horse and from there add a proverbial backdoor to a person's computer to remotely control and monitor the infected system.
