So, I have a weird bug (that may be a problem with BUG in particular?). I've been playing normally in a Rome game, then suddenly between 824 and 828 the game becomes very laggy (with no lag problems at all before, and generally no lag problems on my computer typically even in the Modern Era), and the civilization ranking/contact/etc. on the right of the screen disappears. I have zero idea what's causing this, but it seems to happen when the turn changes.
Any ideas? I'm on revision 590, for what it's worth, which seems to be stable otherwise (played a China game from -3000 into the 1900s with no problems on the same revision).