  We report on some efforts recently made in order to gain a better
understanding of some IR properties of the 3-point gluon Green's function by
exploiting results from large-volume quenched lattice simulations. These
lattice results have been obtained by using both tree-level Symanzik and the
standard Wilson action, in the aim of assessing the possible impact of effects
presumably resulting from a particular choice for the discretization of the
action. The main resulting feature is the existence of a negative logaritmic
divergence at zero-momentum, which pulls the 3-gluon form factors down at low
momenta and, consequently, yields a zero-crossing at a given deep IR momentum.
The results can be correctly explained by analyzing the relevant
Dyson-Schwinger equations and appropriate truncation schemes.
