Adobe Systems Inc. is warning about a potential new security flaw in the latest versions of its Adobe Reader products. In its product security incident response team blog, Adobe issued a brief advisory on Monday, saying it is investigating reports of a security hole in Adobe Reader 9.1 and 8.1.4. The company says it will provide an update once it gets more information. The SecurityFocus submission on this vulnerability indicates that it is a Javascript flaw in Reader for versions designed to run on Linux operating systems, although that advisory suggests that other versions or operating systems may also be affected. This may turn out to be nothing, but my gut tells me that we may soon be rehashing an incident from February, when malware and hackers were discovered to be using a previously unknown Javascript vulnerability in Adobe Reader to break into machines running the software. This also reminds