  A new fit of a chirally motivated coupled-channels model for meson-baryon
interactions is presented including the recent SIDDHARTA data on the 1s level
characteristics of kaonic hydrogen. The kaon-nucleon amplitudes generated by
the model are fully consistent with our earlier studies. We argue that a sharp
increase of the real part of the in-medium $K^{-}p$ amplitude at subthreshold
energies provides a link between the shallow $\bar{K}$-nuclear optical
potentials obtained microscopically from threshold $\bar{K}N$ interactions and
the phenomenological deep ones deduced from kaonic atoms data. The impact on
the $A$-dependence of the $\Lambda$-hypernuclear formation rates measured in
reactions with stopped kaons is discussed too.
