So, the official Changelog (thanks to sirinan for notifying):
Features and Gameplay:
Content Additions:
* NEW! By community demand Duel mode is being introduced into multi-player. You can now partake in 1 on 1 protected duels.
* NEW! Server setting to disallow ranged weapons, get rid of pesky archers with one click!
* NEW! Two new horse armors have been added for Steppe and Sarranid factions.
Gameplay:
* Bow accuracy has been rebalanced, higher tier bows are even better, with low tiers being slightly more inaccurate.
* AI Bots in multi-player have been changed to be more difficult in dedicated servers.
* Economy balance is somewhat tied to campaign difficulty setting.
* Minor Khergit troop stat changes.
* Knock down chances have been reduced.
Fixes:
*AI is no longer able to hit allied horses in single player.
*A minor bug in the spy meeting quest has been fixed.
*Links to finished quests will no longer appear in other notes.
*Several new and useful operations have been added for modders.
*Some shield banners have been fixed for multi-player.
*Various other fixes for non English packs.
*Various other bug fixes.