Frequent crash during Campaign running on Wine


first thanks for the great game. I managed to make it run flawlessly on Wine (1.5), Linux mint 14. That is, until I installed the campaign expansion.

Vanilla game still runs fine, but when I play the campaign, it randomly crashes when I click “fight” (maybe 1 out of 4 times?). Never happens during non-campaign stuff.

Here is what I get in the terminal when such error occurs:

I understand the seg fault is some kind of memory crash/pointer at the wrong place. Do you know what I can do about this?
How can I get more information about where this error comes from? (like, are there error logs somewhere?)

Sorry if I ask silly questions, I’m not exactly tech savvy. Thanks!