  Recent CP violation results in B decays suggest that Z penguins may have
large weak phase. This can be realized by the four generation (standard) model.
Concurrently, B to Xs l+ l- and Bs mixing allow for sizable Vt's* Vt'b only if
it is nearly imaginary. Such large effects in b to s transitions would affect s
to d transitions, as kaon constraints would demand Vt'd different from zero.
Using Gamma(Z to b bbar) to bound |Vt'b|, we infer sizable |Vt's| < |Vt'b| <
|Vus|$. Imposing epsilon_K, K+ to pi+ nu nubar and epsilon'/epsilon
constraints, we find Vt'd* Vt's = few x 10^(-4) with large phase, enhancing KL
to pi0 nu nubar to 5x10^(-10) or even higher. Interestingly, Delta_mBd and
sin(2PhiBd) are not much affected, as |Vt'd* Vt'b| << |Vtd* Vtb| = 0.01.
