Got a weird bug in a MP game. Some luxury and bonus resources changed into bananas. You can see from yield icons and map graphics the actual resources from the tiles, but the resource icons (and tooltip names) had changed into bananas or disappeared completely. I added a screen capture from this game in this post. Spoiler : This bug was preceded by a syncing bug. I started the game as Poland, and played the first turn, during which I placed my capitol. Then, in the next turn, I got desynced and synced back as Persia, which had the capitol already placed and first turn played.