When I delete my world.ini I can join as well, but when I use "my" default world configuration it crashes. Could you try this world.ini?:

EDIT:

It seems like it crashes when it starts generating a regular plains village.

Code:

`[Storage]`

Schema=Default

CompressionFactor=6

[Plants]

IsSugarcaneBonemealable=0

MaxSugarcaneHeight=3

MaxCactusHeight=3

IsCarrotsBonemealable=1

IsCropsBonemealable=1

IsGrassBonemealable=1

IsSaplingBonemealable=1

IsMelonStemBonemealable=1

IsMelonBonemealable=0

IsPotatoesBonemealable=1

IsPumpkinStemBonemealable=1

IsPumpkinBonemealable=0

IsCactusBonemealable=0

[PVP]

Enabled=1

[Physics]

WaterSimulator=Vanilla

LavaSimulator=Vanilla

DeepSnow=1

SandInstantFall=0

ShouldLavaSpawnFire=1

RedstoneSimulator=incremental

TNTShrapnelLevel=2

[GameMode]

GameMode=1

[Generator]

Generator=Composable

BiomeGenCacheSize=64

HeightGenCacheSize=64

BiomeGen=TwoLevel

HeightGen=DistortedHeightmap

CompositionGen=DistortedHeightmap

DistortedHeightmapSeaLevel=62

DistortedHeightmapFrequencyX=25.500000

DistortedHeightmapFrequencyY=40.500000

DistortedHeightmapFrequencyZ=25.500000

CompositionGenCacheSize=64

Finishers=OreNests, Ravines, WormNestCaves, WaterLakes, LavaLakes, Villages, Trees, MineShafts, WaterSprings, LavaSprings, SprinkleFoliage, Ice, Snow, Lilypads, BottomLava, DeadBushes, PreSimulator

MineShaftsGridSize=512

MineShaftsMaxSystemSize=160

MineShaftsChanceCorridor=600

MineShaftsChanceCrossing=200

MineShaftsChanceStaircase=200

LavaLakesProbability=10

WaterLakesProbability=25

BiomalSeaLevel=62

BottomLavaLevel=10

VillageGridSize=384

VillageMaxDepth=2

VillageMaxSize=128

VillageMinDensity=50

VillageMaxDensity=80

[WaterSimulator]

Falloff=1

MaxHeight=7

TickDelay=5

NumNeighborsForSource=2

[LavaSimulator]

Falloff=2

MaxHeight=6

TickDelay=30

NumNeighborsForSource=-1

[General]

Dimension=0

Gamemode=1

[FireSimulator]

BurnStepTimeFuel=500

BurnStepTimeNonfuel=100

Flammability=50

ReplaceFuelChance=50000

[WaterSprings]

HeightDistribution=0, 0; 10, 10; 11, 75; 16, 83; 20, 83; 24, 78; 32, 62; 40, 40; 44, 15; 48, 7; 56, 2; 64, 1; 255, 0

Chance=24

[LavaSprings]

HeightDistribution=0, 0; 10, 5; 11, 45; 48, 2; 64, 1; 255, 0

Chance=9

[SpawnProtect]

ProtectRadius=10

Enable=0

[WorldLimit]

LimitRadius=0

[Difficulty]

WorldDifficulty=2

[Monsters]

Types=bat, cavespider, chicken, cow, creeper, enderman, horse, mooshroom, ocelot, pig, sheep, silverfish, skeleton, slime, spider, squid, wolf, zombie

AnimalsOn=0

VillagersShouldHarvestCrops=1

[Mechanics]

CommandBlocksEnabled=1

PVPEnabled=1

UseChatPrefixes=0

[Seed]

Seed=351966056

[SpawnPosition]

X=0.000000

Y=69.600000

Z=16.000000

PregenerateDistance=20

EDIT:

It seems like it crashes when it starts generating a regular plains village.