  Collective oscillations of lattices of locally-coupled chaotic Roessler
oscillators are studied with regard to the dynamical scaling of their phase
interfaces. Using analogies with the complex Ginzburg-Landau and the
Kardar-Parisi-Zhang equations, we argue that phase coherence should be lost in
the infinite-size limit. Our numerical results, however, indicate possible
discrepancies with a Langevin-like description using an effective white-noise
term.
