  We report on the first next-to-leading BFKL study of the cross section and
azimuthal decorrellation of Mueller Navelet jets. This includes next-to-leading
corrections to the Green's function as well as next-to-leading corrections to
the Mueller Navelet vertices. The obtained results for standard observables
proposed for studies of Mueller Navelet jets show that both sources of
corrections are of equal and big importance for final magnitude and final
behavior of observables, in particular for the LHC kinematics investigated here
in detail. The astonishing conclusion of our analysis is that the observables
obtained within the complete next-lo-leading order BFKL framework of the
present contribution are quite similar to the same observables obtained within
next-to-leading logarithm DGLAP type treatment. The only noticeable difference
is the ratio the azimuthal angular moments < cos 2 phi> / < cos phi > which
still differs in both treatments.
