19:04:50 [SEVERE] Could not pass event BlockIgniteEvent to StackableItems v0.9.4.2
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
at org.bukkit.craftbukkit.v1_6_R2.event.CraftEventFactory.callBlockIgniteEvent(CraftEventFactory.java:637)
at net.minecraft.server.v1_6_R2.DispenseBehaviorFlintAndSteel.b(DispenseBehaviorFlintAndSteel.java:47)
at net.minecraft.server.v1_6_R2.DispenseBehaviorItem.a(DispenseBehaviorItem.java:13)
at net.minecraft.server.v1_6_R2.BlockDispenser.dispense(BlockDispenser.java:82)
at net.minecraft.server.v1_6_R2.BlockDispenser.a(BlockDispenser.java:110)
at net.minecraft.server.v1_6_R2.WorldServer.a(WorldServer.java:532)
at net.minecraft.server.v1_6_R2.WorldServer.doTick(WorldServer.java:199)
at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:564)
at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:226)
at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:486)
at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:419)
at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)
Caused by: java.lang.NullPointerException
at haveric.stackableItems.SIPlayerListener.playerIgniteBlock(SIPlayerListener.java:1349)
at sun.reflect.GeneratedMethodAccessor62.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
... 15 more

I have no idea why I have this.

This is now fixed in the latest dev version: 0.9.4.2.t1

Thanks.