The Sleuth Kit (TSK) 4.0.1 does not properly handle "." (dotfile) file system entries in FAT file systems and other file systems for which . is not a reserved name, which allows local users to hide activities it more difficult to conduct forensics activities, as demonstrated by Flame.
https://bugzilla.redhat.com/show_bug.cgi?id=883330
http://www.openwall.com/lists/oss-security/2012/12/04/2
http://www.openwall.com/lists/oss-security/2012/12/01/2
http://www.mandriva.com/security/advisories?name=MDVSA-2013:125
http://lists.fedoraproject.org/pipermail/package-announce/2013-January/097293.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-January/097289.html
http://labs.bitdefender.com/2012/06/flame-the-story-of-leaked-data-carried-by-human-vector/