This seems serious. More than a quarter of the bees in the US are missing.
They've vanished. They leave the hives to work, and they don't come back.
Much like the foretold doomsday scenario of the vanishing of the frogs, it seems this startling problem needs some immediate and serious attention.
Check out this NY Times article for more.
(And by the way, it seems the Einstein quote floating around is bunk. No one's yet been able to trace it to Mr. Relativity. Still, I suppose if tacking Einstein's name to it gets a brighter light shone on this problem, then fine.)