  Experiments have been performed using microscopic beads to probe the small
scale mechanics of actin solutions. We show that that there are a number of
regimes possible as a function of the size of the probing particle. In certain
cases we argue that the quasi-static response resembles a smectic crystal
rather than an isotropic solid, implying an anomalous scaling of the mechanical
response of actin solutions as a function of the size of the probing particles.
