The following bug appears to have been introduced in version 126.96.36.199 since I don't recall it being mentioned previously. When playing a new game after getting the patch, I noticed that I was researching techs several turns earlier than I should have. The attached save game (Research.Civ5Save) begins on turn 176. I'm generating 12 science per turn, have 170 science out of 213 needed to discover Writing and should actually research Writing in 4 turns. On turn 177 I now have 182 science and should discover Writing in 3 turns. This is as expected. However, I discover Writing at the beginning of turn 178. Science output is still shown as 12/turn. I now begin to research Sailing, which also requires 213 science and there was no carryover. Finally, on turn 179 I now generate 13 science/turn and have 17 science out of 213 needed. Perhaps this bug was created when trying to fix the lack of science overflow mentioned in this thread. Or am I overlooking something about the way science works? ETA: I forgot to mention that you need to have the Babylon DLC to load this game. ETA2: After starting other games, I found that after the first tech discovery, everything is fine and the tech overflow is correctly carried over. However, subsequent techs exhibit the sort of problem mentioned above. Moderator Action: I'll confirm this bug since it has happened in all my post-patch games. Moved to the Confirmed Bugs forum.