  For weighted Toeplitz operators $\T^N_\phi$ defined on spaces of holomorphic
functions in the unit ball, we derive regularity properties of the solutions
$f$ to the integral equation $\T^N_\phi(f)=h$ in terms of the regularity of the
symbol $\phi$ and the data $h$. As an application, we deduce that if
$f\not\equiv0$ is a function in the Hardy space $H^1$ such that its argument
$\bar f/f$ is in a Lipschitz space on the unit sphere $\bB$, then $f$ is also
in the same Lipschitz space, extending a result of K. Dyakonov to several
complex variables.
