Naval battles cause my game to crash

[Brutus]

Hi,

Back after a looong hiatus... I got Shogun 2 this weekend, and I'm loving it so far. However, every time I play a naval battle (as Shimazu), once the battle is over and I click "end battle", the game just... crashes. It freezes up, and only with ctrl+alt+del am I able to get my computer to do anything (after which I get a "Shogun 2 is not working..." message). This is kind of ruining the game for me, as I like playing the naval battles (and the autoresolve keeps killing off my Nanban trade ships even though they should be able to trash an entire fleet by themselves).

Does anyone else have this problem? Is it a known issue?

Thanks in advance for any help!