  We describe the dynamical behavior found in numerical solutions of the Vector
Complex Ginzburg-Landau equation in parameter values where plane waves are
stable. Topological defects in the system are responsible for a rich behavior.
At low coupling between the vector components, a {\sl frozen} phase is found,
whereas a {\sl gas-like} phase appears at higher coupling. The transition is a
consequence of a defect unbinding phenomena. Entropy functions display a
characteristic behavior around the transition.
