I mentioned on Twitter that a guildie of mine had gotten kicked from a PUG because druids can't tank. Luckily, I remembered to screenshot it, so here's proof:
Incidentally, in case you're wondering if it was a problem with this particular druid, it was not: he tanked two heroics for me later and did a fantastic job - one of the best bear tanks I've had the luxury of smacking mobs around with.
Someone should please tell our guild's co-leader about this new and startling development in what druids can't do, because apparently he's been laboring under the mistaken impression that bears can tank. Thank goodness a random person on the internets has corrected us all!