Three topics of relevance for $\tau$-decays will be presented:
i) the possibility to search for CP violation in the Cabbibo suppressed channels
$\tau \to \nu K \pi \mbox{and} \nu K \pi \pi$,
ii) recent partial results on the semileptonic decay rate in $\as^4$ accuracy,
and iii) the possibility to determine the strange quark mass in inclusive
Cabbibo suppressed decays.
P.A. Baikov, K.G. Chetyrkin and J.H. K\“uhn
Proceedings of the Workshop on Heavy Quarks and Leptons, Vietri sul Mare, Italy, May 2002, FRASCATI PHYSICS SERIES, Vol. XXVIII, 453-468