I'm not sure, line 103 is different in my version so I am not entirely sure what is causing it. I am also not very familar with bukkit or how it loads. Maybe try putting IC2 in the jar? That is just a guess, I've not much to go on. Looks like it is some issue with the load order.
I think it's the recipe generating function breaking for some reason. And as far as I can tell the crossover mod is loading last.
Using the bukkit port on my server that only has IC2, Buildcraft, Advanced Machines, and Modular Force FIeld I get an error whenever I try to start the server up. I think I installed it properly and I checked for block id conflicts so I'm not really sure what is the matter.
Modloader.txt output
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader init
FINE: ModLoader Server 1.0.0 Initializing...
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader readFromModFolder
FINER: Adding mods from C:\Users\Zilulil\Desktop\Minecraft Server\mods\zbuildcraft-ic2-crossover-server-1.14b-bukkit-cb1597.zip
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader readFromModFolder
FINER: Zip found.
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader addMod
FINE: Mod Loaded: "mod_BCIC2Crossover 1.14 for MC 1.0, BC 2.2.11, IC2 1.43" from mod_BCIC2Crossover.class
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader readFromClassPath
FINER: Adding mods from C:\Users\Zilulil\Desktop\Minecraft Server\craftbukkit-1.0.1-R1.jar
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader readFromClassPath
FINER: Zip found.
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader addMod
FINE: Mod Loaded: "mod_BuildCraftBuilders 2.2.11" from mod_BuildCraftBuilders.class
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader addMod
FINE: Mod Loaded: "mod_BuildCraftCore 2.2.11" from mod_BuildCraftCore.class
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader addMod
FINE: Mod Loaded: "mod_BuildCraftEnergy 2.2.11" from mod_BuildCraftEnergy.class
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader addMod
FINE: Mod Loaded: "mod_BuildCraftFactory 2.2.11" from mod_BuildCraftFactory.class
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader addMod
FINE: Mod Loaded: "mod_BuildCraftTransport 2.2.11" from mod_BuildCraftTransport.class
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoaderMp Log
FINE: ModLoaderMP 1.0.0 Initialized
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader addMod
FINE: Mod Loaded: "mod_IC2 v1.43" from mod_IC2.class
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader addMod
FINE: Mod Loaded: "mod_IC2AdvancedMachines v3.1" from mod_IC2AdvancedMachines.class
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader addMod
FINE: Mod Loaded: "mod_ModularForceFieldSystem 1.0 Beta 4_M1.0" from mod_ModularForceFieldSystem.class
Jan 18, 2012 10:40:21 PM ModLoader init
FINER: THROW
java.lang.NullPointerException
at net.minecraft.server.CraftingManager.registerShapedRecipe(CraftingManager.java:147)
at net.minecraft.server.ModLoader.AddRecipe(ModLoader.java:288)
at net.minecraft.server.mod_BCIC2Crossover.ModsLoaded(mod_BCIC2Crossover.java:103)
at net.minecraft.server.ModLoader.init(ModLoader.java:561)
at net.minecraft.server.ModLoader.Init(ModLoader.java:1082)
at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:100)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:402)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
Jan 18, 2012 10:40:21 PM net.minecraft.server.ModLoader ThrowException
SEVERE: Unexpected exception
java.lang.NullPointerException
at net.minecraft.server.CraftingManager.registerShapedRecipe(CraftingManager.java:147)
at net.minecraft.server.ModLoader.AddRecipe(ModLoader.java:288)
at net.minecraft.server.mod_BCIC2Crossover.ModsLoaded(mod_BCIC2Crossover.java:103)
at net.minecraft.server.ModLoader.init(ModLoader.java:561)
at net.minecraft.server.ModLoader.Init(ModLoader.java:1082)
at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:100)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:402)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
