866409 The changelog on the Wiki shows a ton of fixes for 'rare' things that I've never had happen to me. As I said in the Skyrim thread, it claims to, but fails to fix the Investor bug with three merchants or the fact that Collette in the college doesn't sell the master spell tome after completing the quest for it. It disables dragon attacks during 'Battle for Whiterun.' I've never had that happen, but did have one during the battle for Fort Greenwall and one in another game when I was about to start the battle. Dragons aren't supposed to spawn so much after beating the main quest. (I've noticed some difference but also there have been some oddities such as a dragon spawning when I went to Throat of the World but it wasn't hostile.
I've noticed some new bugs though. It's always hard to say if the patch caused them, but twice I was unable to use the keyboard (except for opening the console) after fast traveling and had to shut down the game and restart. Just now, I got attacked in Cragslane Cavern by a bandit that had nothing displayed for his name and was unlootable after being killed.
Skyrim:Patch - UESPWiki