What was this update exactly?

All I've heard is that it removes any and all magical resistances, and dragons act weird. Haven't heard about it fixing anything yet (I haven't downloaded it - this is just based on what I've read).

It was supposed to fix the 360 texture and PS3 lag issues. I hear that it just made things worse though (magic resistances have disappeared).

http://www.bethblog.com/index.php/2011/11/28/skyrim-1-2-update/

UPDATE 1.2 NOTES (all platforms unless specified)
?Improved occasional performance issues resulting from long term play (PlayStation 3)
?Fixed issue where textures would not properly upgrade when installed to drive (Xbox 360)
?Fixed crash on startup when audio is set to sample rate other than 44100Hz (PC)
?Fixed issue where projectiles did not properly fade away
?Fixed occasional issue where a guest would arrive to the player’s wedding dead
?Dragon corpses now clean up properly
?Fixed rare issue where dragons would not attack
?Fixed rare NPC sleeping animation bug
?Fixed rare issue with dead corpses being cleared up prematurely
?Skeleton Key will now work properly if player has no lockpicks in their inventory
?Fixed rare issue with renaming enchanted weapons and armor
?Fixed rare issue with dragons not properly giving souls after death
?ESC button can now be used to exit menus (PC)
?Fixed occasional mouse sensitivity issues (PC)
?General functionality fixes related to remapping buttons and controls (PC)