From William F. Maddock:

Re: Distant planet judged possibly habitable (April 23, 2007): Contrary to what Xa­vi­er Delfosse claims, this find is not tempting at all. Where are the gas giants that are needed to protect the system’s small planets from being blasted by comets and other debris? Where is the large moon that is needed to stabilize the rotation of the planet and to stir up the proposed oceans? At the reported distance from the star, the planet is likely to be orbitally locked, facing one side constantly toward the star with the other side constantly in night. Simply because a planet’s worldwide average temperature falls within an acceptable range does not mean the place is at all hospitable to life. There are many factors against this being exciting at all as regards a haven for life.