  We discuss the present status of global fits to the CKM unitary triangle
using the latest experimental and theoretical constraints. For the required
nonperturbative weak matrix elements, we use three-flavor lattice QCD averages
from www.latticeaverages.org; these have been updated from Ref. [1] to reflect
all available lattice calculations as of the "End of 2011". Because of the
greater than 3 sigma disagreement between the extraction of |Vub| from
inclusive and exclusive semileptonic b -> u l nu (l = e,mu) decays, particular
emphasis is given to a clean fit in which we remove the information from these
decays. Given current theoretical and experimental inputs, we observe an
approximately 3 sigma tension in the CKM unitarity triangle that may indicate
the presence of new physics in the quark-flavor sector. Using a
model-independent parameterization of new-physics effects, we test the
compatibility of the data with scenarios in which the new physics is in kaon
mixing, in B-mixing, or in B -> tau nu decay. We find that scenarios with new
physics in B -> tau nu decay or in B-mixing are approximately equally
preferred. Finally, we interpret these results in terms contributions to Delta
S = 2 and Delta B = 2 four-fermion operators. We find that the preferred scale
of new physics (with Standard-Model like couplings) is in the few hundred GeV
range.
