  It has been known since the time of Nielsen that the mapping class group
$\text{Mod}_{g,1}$ of a surface of genus $g$ and one puncture acts faithfully
by homeomorphisms on the circle. In this note, we show that this standard
representation of the mapping class group is not rigid, precisely, if
$G<\text{Mod}_{g,1}$ is a finite index subgroup then there exist infinitely
many non--conjugate faithful representations $G\to \text{Homeo}^+(S^1)$. We
thus answer a question of B. Farb.
