Minecraft wiki entry for Texture_Update, associated text: The hand texture of the Drowned uses an old Zombie hand texture rather than the new one.[19] This also affects Zombie Villagers, Illagers and Vexes, which is confirmed to be intended.[20]
The options background still uses the old Dirt texture, rather than its updated version. This is probably not a Texture Update issue, as the dirt texture was last changed in 1.0.0.[21]
Podzol and still use old side textures rather than updated ones, even though their top textures are updated.[22]
While normal pumpkin stem and attached melon stem use updated textures, attached pumpkin stem and normal melon stem still use the old ones.
Grass Blocks still use their old top texture rather than updated one, even though their new top texture has appeared in Texture Update Betapack V1 & V2.