When playing with the Bots, they don't know how to use the "Lurker" card, and the game freezes. I passed a "Lurker" on a Masquerade move. When the Bot later played the card from its hand, the game froze. Screenshot attached.
Yes, see this thread: http://forum.shuffleit.nl/index.php?topic=1787
I think the evidence suggests that the code for the AI that implements what to do (trash something from the supply or gain something from the trash) is not implemented. Normally the AI gets away with that by simply not buying Lurker, but if it is passed the Lurker via Masquerade, or forced to play in a loaded game from a position with Lurker, the game will hang.