A Dragon's bounding box for their model, is too large. While grounded and attempting to chase a player, a lot of the time they can miraculously become stuck trying to move through an area they previously were able to move through effortlessly, even though visually, they should still be able to maneuver fine.
(-Buying items in rapid succession can have a different item highlighted (even somewhere else in the list) and that item can be accidentally purchased) This can also happen when selling items, and often happens when the item being bought or sold, is part of a stack, or there are multiple of the same item in the seller or buyer's inventory.
Underwater lighting may behave incorrectly in some odd cases, and appear extremely bright and well lit, instead of murky. Not sure what the cause of this is.
Alduin's health and melee damage does not scale properly. This is probably related to the issue where followers do not scale to the player once they have been encountered, and since Alduin is encountered as part of the tutorial early in the game, his statistics likely do not upgrade correctly and may be affected by the same problem.
Marked for death can reduce the armor rating of an enemy, even after they have respawned. If you kill an enemy after using marked for death on them, when the enemy respawns its armor will already be lowered from before. Solution would probably be to clear the instance of the shouts effect, and to cap the maximum decrease in armor/resistances incurred from any effect.
All enemy dragons use magicka for their shouts, and are helpless if magicka is depleted. That should not really be the case as it makes no sense.
When fighting Alduin at the throat of the world, for the quest Alduin's Bane, sometimes the battle music will fail to trigger.