  The CMB anisotropy at $\ell\lsim 60$ seems to have some special features
which include (i) a dipole modulation and (ii) a decrease in power. It is known
that both of these effects can be generated if a curvaton-type field has a
super-horizon perturbation.
  It is also known that this will generate non-gaussianity $\fnl$ in the same
range of $\ell$, whose magnitude has a lower bound coming from the magnitude of
the observed CMB quadrupole. I revisit that bound in the present paper, and
point out that it may or may not be compatible with current data which should
therefore be re-analysed.
