I just now saw this, and haven't read any of the replies yet, so I'm sure that this has been said already....
NO MORE MASQ PINS!!
I know that a lot of people will like them, but as someone who really likes "alternate win conditions", I think a setup that allows a Masq pin makes for a fun game.
Now there's a separate question about if old cards are considered to have errata or not. If my physical Throne Room doesn't say "you may", should I still play as if it did to be fully following the rules of Dominion? Similar to how MTG has the Oracle card wordings, and what's printed on the card doesn't matter? (Unless you have R&D's Secret Lair in play, of course).