I will start with what I have found so far.
1) In the first scene where they're calling you to get executed, every NPC is floating 5cm above the ground. You can tell because the shadow doesn't start at their feet but about 5cm below.
2) In Arcadia's Cauldron, when the shop owner goes to bed, she will still talk even if she's asleep. I do not know if it's the same for every merchant. Also, she seems to be spamming her text lines but maybe it's just me.
Thanks. I hope it gets stickied or that a mod will make a new thread for bugs and glitches found in Skyrim.
-Utopi