Here are the patch notes for Total War: ROME II- Patch 1 (06.09.13):

• Higher average frame rates with out-of-the-box settings (more conservative settings)
• Fix for DirectX 10.0 Lighting issue reported - environment map wasn't being created leading to black reflections.
• Fixed a sunken Samothrace temple complex world wonder on the Campaign map.
• Fixed defender being able to create encampments when involved in a combined battle.
• Added some localisation fixes to audio packs in French, Russian, Italian, German and Spanish.
• Fixed lock up in Multiplayer Campaign battles when a desynchronisation occurs. Players are now notified of the desynchronisation, and the battle ends.
• Fixed Multiplayer Campaign battle "overrun" prompt, which was not being shown to a player if they were a reinforcement and the other player was spectating.
• Fixed corrupt loading screen when changing to fullscreen / windowed mode after a battle, and then going into another battle.
• Fix for Multiplayer Campaign host being unable to move the camera in campaign, after reloading a save game on some rare occasions.
• Safe guards added to prevent a very rare crash in coastal assault battles.
• Fix for game lock up during end turn sequence / Celtic AI faction turn in single player campaign.
• Improved AI use of walls on Athens large settlement battle map.
• Improvements to Auto-resolve balancing in Single Player and Multiplayer Campaign modes.
• Aligned ship unit upkeep costs with land units - made mercenary ships more expensive and non-mercenary ships cheaper.
• Fixed slow turning rates for transport ships.
• Improved civil war balancing in relation to campaign difficulty.
• Fixed vehicle ground pipes, to prevent Siege Towers becoming immovable when they are left empty during the Deployment Phase of a Siege Battle, then units were moved into the Siege Tower when the battle has started.
• Fixed bug when ramming sideways into moving ship, which caused the ramming ship stick to target and strafe along with it in battles.
• Reduced the chance of Naval units sometimes clipping through the ground or harbours / ports during Port Assault battles when attempting to disembark.
• Fixed issue where armies would be stuck in Muster stance and could not exit that stance in Campaign modes.
• Fixed case where spies could get stuck on top of fleets in Campaign modes.
• Fixed rare post battle lockup in Campaign modes.
• Improved unit pathfinding in Barbarian village battle maps (fixed no go zones).
• Fix for Multiplayer Campaign lock up when the player was reinforcing an AI ally who was victorious in battle, causing the player to become stuck with no victory / continue / exit battle user interface functionality.
• Fix for cultural influence bonus from the Shrine of Neptune building
• Fix for “Zone of Controls” of hidden armies being visible to both players in head to head Multiplayer Campaign mode on mouse-over.
• Assorted minor fixes to city battle maps.
• Fix for "Rome Wasn't Built in a Day" achievement failing to unlock when its requirements were met in some situations.