Credit to drheld for finding this bug. There aren't any curses left to be gained on the possession turn.
http://councilroom.com/game?game_id=game-20120329-201642-64791f44.html#aredoubles-show-poss-turn-18-1curse 1
--- aredoubles's turn 6 ---
aredoubles plays a Mountebank.
... getting +$2.
... dingding gains a Copper and a Curse.
curse 2
--- dingding's turn 6 ---
dingding plays a Familiar.
... drawing 1 card and getting +1 action.
... aredoubles gains a Curse.
curse 3
--- aredoubles's turn 8 ---
aredoubles plays a Familiar.
... drawing 1 card and getting +1 action.
... dingding gains a Curse.
curse 4 and 5
--- dingding's turn 8 ---
dingding plays a Bazaar.
... drawing 1 card and getting +2 actions and +$1.
dingding plays a Familiar.
... drawing 1 card and getting +1 action.
... aredoubles gains a Curse.
dingding plays a Familiar.
... drawing 1 card and getting +1 action.
... aredoubles gains a Curse.
curse 6
--- aredoubles's turn 10 ---
aredoubles plays a Bazaar.
... drawing 1 card and getting +2 actions and +$1.
aredoubles plays a Familiar.
... drawing 1 card and getting +1 action.
... dingding gains a Curse.
curse 7
--- dingding's turn 10 ---
dingding plays a Familiar.
... drawing 1 card and getting +1 action.
... aredoubles gains a Curse.
curse 8
--- dingding's turn 11 ---
dingding plays a Familiar.
... drawing 1 card and getting +1 action.
... aredoubles gains a Curse.
curse 9
--- dingding's turn 12 ---
dingding plays a Familiar.
... drawing 1 card and getting +1 action.
... aredoubles gains a Curse.
curse 10
--- dingding's turn 14 ---
dingding plays a Familiar.
... drawing 1 card and getting +1 action.
... aredoubles gains a Curse.
and then the bug
--- dingding's turn (possessed by aredoubles) ---
dingding plays a Market.
... drawing 1 card and getting +1 action, +1 buy, and +$1.
dingding plays 3 Coppers.
dingding buys a Smithy.
... ... aredoubles gains the Curse. ... aredoubles gains the Smithy.
(dingding reshuffles.)
(dingding draws: a Copper, a Familiar, 2 Silvers, and a Curse.)