I have artillery in production (Ville de Quebec). When it is ready, I like to move or fortify it (as I used to). But in that moment, the game freezes. I have tried to abord production and go on playing. But the same error occures whith other units (not with all).
savegame for bug
This is a duplicate of BR#2523, now fixed in trunk. The problem occurs when a non-military unit with a goto order (such as your galleon "Le Sacre") tries to move to a tile which is occupied by an enemy unit (tile 30,88 contains an English caravel). To work around the problem change the goto destination of the problem unit.