here is the short version:

java.lang.NumberFormatException: For input string: "fffffffdffffffec"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Long.parseLong(Long.java:592)
at java.lang.Long.valueOf(Long.java:776)
at java.lang.Long.decode(Long.java:928)
at futurepack.common.FPDungeonProtection$DungeonProtection.loadQueed(FPDungeonProtection.java:215)
at futurepack.common.FPDungeonProtection$DungeonProtection.onChunkOpen(FPDungeonProtection.java:284)
at futurepack.common.FPDungeonProtection.onChunkOpen(FPDungeonProtection.java:99)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_1557_FPDungeonProtection_onChunkOpen_Load.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:185)
at net.minecraftforge.common.chunkio.ChunkIOProvider.syncCallback(ChunkIOProvider.java:98)
at net.minecraftforge.common.chunkio.ChunkIOExecutor.tick(ChunkIOExecutor.java:150)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:673)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:149)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471)
at java.lang.Thread.run(Thread.java:745)

here is the pastebin:
(most of it)

so you just entered the world and it crashed ? Does this ever happens or only sometimes? Can you repdroduce this with the coremods ?

Brandon's Core (BrandonsCore-1.10.2-2.1.4.92-universal.jar)
IvToolkit (IvToolkit-1.3.2.1-1.10.jar)
SurgeLoadingPlugin (Surge-1.10.2-1.1.0.68.jar)
MalisisCorePlugin (malisiscore-1.10.2-4.3.0.jar)
NWRTweak (redstonepaste-mc1.9.4-1.7.4.jar)
LoadingPlugin (ChunkAnimator-MC1.9.4-1.2.jar)
IC2core (industrialcraft-2-2.6.142-ex110.jar)
CCLCorePlugin (CodeChickenLib-1.10.2-2.5.4.218-universal.jar)
Do not report to Forge! Remove FoamFixAPI (or replace with FoamFixAPI-Lawful) and try again. (foamfix-0.5.4-anarchy.jar)
AdvancedRocketryPlugin (AdvancedRocketry-1.10.2-1.0.10.jar)
CorePlugin (MrTJPCore-1.10.2-2.0.0.12-universal.jar)
OpenEyePlugin (OpenEye-1.10.2-0.8.jar)
ForgelinPlugin (Forgelin-1.3.1.jar)
literalascension (literalascension-1.10.2-1.0.1.1.jar)
AstralCore (astralsorcery-1.1.3-beta.jar)
BookshelfLoadingPlugin (Bookshelf-1.10.2-1.4.3.340.jar)
ShetiPhian-ASM (shetiphiancore-1.10.0-3.3.7.jar)
OFMDepLoader (OpenFM-1.9.4-0.1.0.22.jar)
LoadingPlugin (RandomThings-MC1.10.2-3.7.7.jar)
DynamicSurroundingsCore (DynamicSurroundings-1.10.2-3.2.8.1.jar)
LittlePatchingLoader (LittleTiles v1.3.10 mc1.10.2.jar)
RebornCoreASM (RebornCore-1.10.2-2.13.4.128-universal.jar)
CoreMod (Aroma1997Core-1.9.4-1.1.1.1.jar)
EnderCorePlugin (EnderCore-1.10.2-0.4.1.65-beta.jar)
LoadingPlugin (Quark-r1.1-70.jar)
llibrary (llibrary-1.7.4-1.10.2.jar)
AppEngCore (appliedenergistics2-rv4-alpha-11.jar)
TransformerLoader (OpenComputers-MC1.10.2-1.6.1.6.jar)
CreativePatchingLoader (CreativeCore v1.6.21 mc1.10.2.jar))

Don't quote me on this, but this crash only happens when generating one of fp's dungeons. So what happened was, I explored for a bit, then crashed.

I may try testing said core mods in a bit, if you do not respond with anything... :P

Same issue here, happened during world generation:

Stacktrace: http://pastebin.com/JwnfxV4A

Ok I found out what is causing this, somehow java is unable to decode long hexcode of negative values, thats why it crashes.

when loading the world, i instead got this:

java.lang.NullPointerException: Exception in server tick loop
at futurepack.common.FPDungeonProtection$DungeonProtection$ProtectionData.deserializeNBT(FPDungeonProtection.java:413)
at futurepack.common.FPDungeonProtection$DungeonProtection.loadQueed(FPDungeonProtection.java:220)
at futurepack.common.FPDungeonProtection$DungeonProtection.onChunkOpen(FPDungeonProtection.java:284)
at futurepack.common.FPDungeonProtection.onChunkOpen(FPDungeonProtection.java:99)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_1561_FPDungeonProtection_onChunkOpen_Load.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:185)
at net.minecraftforge.common.chunkio.ChunkIOProvider.syncCallback(ChunkIOProvider.java:98)
at net.minecraftforge.common.chunkio.ChunkIOExecutor.tick(ChunkIOExecutor.java:150)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:673)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:149)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471)
at java.lang.Thread.run(Thread.java:745)

Ok, I think this Version should also fix that problem.

Does this version fix the bug ?

the server appears to be slow/down

@meelock works fine on my end, might be a routing issue, try again in a bit.

its still failing due to a networking error, eg its being slow... can you host it on another site, such as dropbox?

Well our server is up and running fine with excelent speed, but sure: Mediafire

this issue appears to be fixed, thanks!