I've gotten regular crashes during away missions since last night; will try the dynamic lighting switch to see if it works. I've also gotten a couple BSODs from this as well, though I'm not sure it's related to others' experiences. The error message was something like "Bad_Pool_Caller", I believe.
I'm experiencing the same problem, especially with the Starbase 24 away mission and the Celes Base mission. I was never able to complete these missions in the open beta for the same reason. Adjusting video options doesn't seem to help.