I am also having the same problem. I took a break from FFXI 6-7 months ago and had to put up with this crashing for 2-3 months. I recently came back and I am still experiencing the crashing. I couldn't find anyone that had a similar problem back then and now I see I'm not the only one. And it only happens with FFXI too.

I also have an HD 6970 so that does appear to be the culprit.

I was wondering if anyone in this thread happened to solve it?