First, hooray, the game is finally stable enough I can sometime play for 75-100 turns without CTD! Very nice! However, turns were still really sluggish, selcting cities and units was painful click click click ah finally got it!
I decided to check out the new research features, and was really looking forward to things greying out. Right now it appears that techs do not change colors at all. At research level 6, the items that were green at level 1 were still green, the items that were yellow at level 1 were still yellow (they never turned to green) and I had a truckload of red items (I believe at this point I had one green, two yellow and about 20 red techs. So that is obviously not working as intended. It was interesting though becuase at level 4 I had about 6 options appear to choose from (got lucky on a bunch of red techs) but then at 5 I only had two (1 green and 1 yellow which had both been that color from the beginning).
Good news is I am betting this is an easy quick fix to get functioning properly.
Thanks again for letting us participate this early in development.