Holy cow, I wrote a book!
The Washington Post
did a spot check of area wine stores and found that
of the "shelf talkers" signs (those things
that describe the wine and tell you what score it received
from Wine Spectator magazine) it found,
a quarter of them were incorrect,
usually by attributing a good score to the correct wine vineyard but
from a different year.
So when you cruise the wine store, make sure to double-check that
the information placard actually matches the wine it's posted next to.