  We apply, to the new OPAL data on V+A strange spectral functions, a suitable
combination of QCD spectral sum rules directly sensitive to the combination of
strange quark (m_s) and tachyonic gluon (\lambda^2) masses . Using the mean
value of \lambda^2 from a sum rule analysis of different channels, we deduce
the invariant strange quark mass m_s= (106 +33 -37) MeV to order \alpha_s^3,
which leads to the running mass m_s(2 GeV)= (93 +29 -32) MeV. We also obtain an
interesting though less competitive estimate of the CKM angle:
|V_{us}|=0.217\pm 0.019.
