Hello, just tried out your mod. But now after some playing i explored some new land. And the server stops and I can't enter again. Actually, I can enter, but it crashes right away.

---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 2012-12-09 10:50
Description: Exception ticking world

java.lang.NullPointerException
at xv.g(World.java:588)
at abq.a(WorldGenDungeons.java:26)
at aau.a(SourceFile:446)
at im.a(ChunkProviderServer.java:242)
at zs.a(Chunk.java:1224)
at im.c(ChunkProviderServer.java:137)
at im.d(ChunkProviderServer.java:150)
at xv.isBlockSolidOnSide(World.java:4393)
at xv.isBlockSolidOnSide(World.java:4372)
at xv.v(World.java:2863)
at yi.a(SpawnerAnimals.java:211)
at yi.a(SpawnerAnimals.java:127)
at in.b(WorldServer.java:120)
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:662)
at ho.r(DedicatedServer.java:252)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:592)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:499)
at fy.run(SourceFile:856)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Stacktrace:
at xv.g(World.java:588)
at abq.a(WorldGenDungeons.java:26)
at aau.a(SourceFile:446)
at im.a(ChunkProviderServer.java:242)
at zs.a(Chunk.java:1224)
at im.c(ChunkProviderServer.java:137)
at im.d(ChunkProviderServer.java:150)
at xv.isBlockSolidOnSide(World.java:4393)
at xv.isBlockSolidOnSide(World.java:4372)
at xv.v(World.java:2863)
at yi.a(SpawnerAnimals.java:211)
at yi.a(SpawnerAnimals.java:127)
at in.b(WorldServer.java:120)

-- Affected level --
Details:
Level name: Old school!
All players: 1 total; [iq['ZH666'/210, l='Old school!', x=47,03, y=108,90, z=-80,81]]
Chunk stats: ServerChunkCache: 893 Drop: 0
Level seed: -6025194406558056446
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (-224,64,248), Chunk: (at 0,4,8 in -14,15; contains blocks -224,0,240 to -209,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 99284 game time, 128993 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 124837 (now: false), thunder time: 51197 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:662)
at ho.r(DedicatedServer.java:252)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:592)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:499)
at fy.run(SourceFile:856)

-- System Details --
Details:
Minecraft Version: 1.4.5
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.6.0_33, Sun Microsystems Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
Memory: 834398904 bytes (795 MB) / 1029046272 bytes (981 MB) up to 1029046272 bytes (981 MB)
JVM Flags: 2 total; -Xmx1024M -Xms1024M
AABB Pool Size: 4338 (242928 bytes; 0 MB) allocated, 8 (448 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
FML: MCP v7.23 FML v4.5.17.479 Minecraft Forge 6.4.1.426 4 mods loaded, 4 mods active
mcp Minecraft Coder Pack Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
FML Forge Mod Loader Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
Forge Minecraft Forge Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
ExtrabiomesXL ExtrabiomesXL Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 719 (40264 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 10; [iq['ZH666'/210, l='Old school!', x=47,03, y=108,90, z=-80,81]]
Is Modded: Definitely; Server brand changed to 'forge,fml'
Type: Dedicated Server (map_server.txt)

I just removed the generate villages in every ExtraBiomes zone. Now it works.. Something you guys have to work on.
Do I have to remove village-spawn from the vanilla areas too?

ScottKillen, Swe?

"or other mod interaction. " I have only this mod so it's something in Extrabiomes that makes the crash.

I understand what you are saying...and it could be that enabling a village in a biome creates the situation...but what I am saying is that the only part EBXL is playing is it is letting you enable the village...the crash is happening during gametime...and also, if you look at your stacktrace...there is no Extrabiomes code executing at the time of the crash.

Can you provide the full forge server log, not just the crash report?

It's odd that it is the villages that make it work -- the crash is happening in the dungeon code.

Scott, what would happen if a village generated in extreme hills, at a low point, and spread into an area where a surface dungeon happened to be? Would a village building on top of a dungeon cause something like this?

All our mod does is set a flag at start to generate villages or not based on configuration settings. We are not involved in any way at runtime. It may be that there is some bug or other mod interaction.

So after updating to 3.6.0 I started flying around in creative mode, once a reached a point I crashed. Tried to get back, and just crashed again.
I had a very similar crash report, compared to the issue poster:

ava.lang.NullPointerException
at xv.g(World.java:588)
at abq.a(WorldGenDungeons.java:26)
at aau.a(SourceFile:446)
at im.a(ChunkProviderServer.java:242)
at zs.a(Chunk.java:1224)
at im.c(ChunkProviderServer.java:137)
at ik.b(PlayerManager.java:143)
at in.b(WorldServer.java:140)
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:662)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:592)
at bdo.q(IntegratedServer.java:158)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:499)
at fy.run(SourceFile:856)

And I was like: "Hey, I've never crashed with EBXL before!" and downgraded to 3.5.0, loaded up the same world I was crashing constantly, and bamm no crash. Maybe it's something in the new version?

Could you please post your error on our thread in the forums? We have a very active community that can many times help you. Github is mainly for new ideas and development. Also, when you post it, per the OP, we need the complete log (ForgeModLoader-0.log -or- ForgeModLoader-client-0.log). Please post that so that we can help you with the issues you are having.