  The strange quark polarization puzzle, i.e. the contradiction between the
negative polarized strange quark density obtained from analyses of inclusive
DIS data and the positive values obtained from combined analyses of inclusive
and semi-inclusive SIDIS data using de Florian et. al. (DSS) fragmentation
functions, is discussed. To this end the results of a new combined NLO QCD
analysis of the polarized inclusive and semi-inclusive DIS data, using the
Hirai et. al. (HKNS) fragmentation functions, are presented. It is demonstrated
that the polarized strange quark density is very sensitive to the kaon
fragmentation functions, and if the set of HKNS fragmentation functions is
used, the polarized strange quark density obtained from the combined analysis
turns out to be negative and well consistent with values obtained from the pure
DIS analyses.
