  We study the magnetization distribution of the Ising model on two regular
fractals (a hierarchical lattice, the regular simplex) and percolation clusters
at the percolation threshold in a two dimensional imbedding space. In all these
cases, the only fixed point is $T=0$. In the case of the two regular fractals,
we show that the magnetization distribution is non trivial below $T^{*} \simeq
A^{*}/n$, with $n$ the number of iterations, and $A^{*}$ related to the order
of ramification. The cross-over temperature $T^{*}$ is to be compared with the
glass cross-over temperature $T_g \simeq A_g/n$. An estimation of the ratio
$T^{*}/T_g$ yields an estimation of the order of ramification of bidimensional
percolation clusters at the threshold ($C = 2.3 \pm 0.2$).
