Yep I'm having the same problem - not always first turn but usually.

The game is completely unplayable to me at the moment which is a shame because there's a lot of new stuff I haven't been able to playtest yet. I will try to post some debug data when I can

Same here. Posted it to the appropriate site. A shame really because as Kuloth mentioned, there are supposedly cool new things added to the game. It was very much a smooth game before, now it is choppy after the first few seconds until my machine freezes.

I was having similar problems. I haven't been able to test since 1a. I had problems in 1a too but I could still manage to play for awhile normally. I cannot remember if I was having the first turn issue in 1b but I've had the issue for awhile now. I've formatted my hard drive and will try again fresh. If it works I'll update my post here.

I'm having the same issue. Unchecking "Disable Depth of Field" in the video options prevents the crashes for me, but viewing the research screen still slows the game to a crawl. (until I restart)