The new issue of the Carlat Report (subscription required) reviews a number of new studies suggesting major psychometric flaws in the construct of PTSD. From the first page:

A recent issue of the Journal of Anxiety Disorders (Vol. 21, 2007) focused on the troubling possibility that the PTSD (posttraumatic stress disorder) construct is not nearly as valid as has been assumed. The articles are both fascinating and provocative and are well worth reading.

These findings are troubling since PTSD is frequently cited by defendants for diminished capacity defenses and in civil claims ranging from disability claims to sexual harassment cases.