  In a recent letter (PRL 95, 190601 (2005)), T.M. Rocha Filho and coworkers
address the very interesting issue of the entropic form to be used for
Hamiltonians with long-range interactions. In our opinion the letter misses
several points quite debated in the recent literature which are of fundamental
importance for a complete discussion of this problem. Moreover it contains
several statements which are not true or not corroborated by any evidence. In
this comment we discuss these arguments and severely question the generality of
the conclusions of this letter.
