  Recently, Hata and Kojita proposed a new energy formula for a class of
solutions in Witten's open string field theory based on a novel symmetry of
correlation functions they found. Their energy formula can be regarded as a
generalization of the conventional energy formula by Murata and Schnabl.
Following their proposal, we investigate their new ansatz for the classical
solution representing double D-branes. We present a regularized definition of
this solution and show that the solution satisfies the equation of motion when
it is contracted with the solution itself and when it is contracted with any
states in the Fock space. However, the Ellwood invariant and the boundary state
of the solution are the same as those for the perturbative vacuum. This result
disagrees with an expectation from the Ellwood conjecture.
