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Chunks do not delete properly remaining in a newly created world if the same world name is reused

1.4 Abandoned Mine Generation - Undocumented?

Structures generating in wrong biomes

Terrain Generation Issues

1.4 features missing in villages

Grass / Flowers / Snow are placed incorrectly in newly created chunks

Desert Temple spawned in place of Swamp Hut

Chopped Mountains

Critical lack of Palm trees

Wold Generation Bug - Square rooms underground

World Generation Problems - Intersecting abandoned mineshafts (Possibly a feature)

Custom superflat world crashes when certain block type is chosen

randomly spawned monster egg blocks

Some trees generate with leaves too far from logs

Big Trees become generic small spherical trees.

Sheep wool color doesn't generate/randomize properly; generating villages resets world RNG

Sugar cane generates through structures

Strange Chunk Placement

superflat generating air

Village Torch Generation Bug

End fails, Random blocks floating enderman More

Torches in abandoned mineshafts sometimes give off light

Same seed + same version may still generate slight differences in worlds.

Biome Placement Tiling

terrain generation is really messed up

Bug with trees forming with half of the tree missing

Invisible Terrain Glitch

The generation of terrain surface layer produces local straight glitches (fix included)

Snow generation bug in Taiga biome.

The generation of "terrain" surface layer in Nether produces local straight artifacts/glitches (partial fix included)