Nope. I put that jar into coremods and now I get:
[embed=425,349]---- Minecraft Crash Report ----
// Ouch. That hurt
Time: 1/6/13 12:01 PM
Description: Exception in server tick loop
cpw.mods.fml.common.DuplicateModsFoundException
at cpw.mods.fml.common.Loader.identifyDuplicates(Loader.java:374)
at cpw.mods.fml.common.Loader.identifyMods(Loader.java:335)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:457)
at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:86)
at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:345)
at net.minecraft.server.dedicated.DedicatedServer.startServer(DedicatedServer.java:64)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:458)
at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)
A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
Minecraft Version: 1.4.6
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_09, Oracle Corporation
Java VM Version: Java HotSpot Client VM (mixed mode), Oracle Corporation
Memory: 964726120 bytes (920 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 3 total; -Xincgc -Xmx1024M -Xms1024M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v7.25 FML v4.6.12.511 Minecraft Forge 6.5.0.467 6 mods loaded, 0 mods active
mcp [Minecraft Coder Pack] (minecraft.jar)
FML [Forge Mod Loader] (coremods)
Forge [Minecraft Forge] (coremods)
BlockBreak [block Break Event] (bin)
epicsquare_Tutorial [Tutorial] (bin)
BlockBreak [block Break Event] (blockbreak-1.4.5-0.jar)
Profiler Position: N/A (disabled)
Is Modded: Definitely; Server brand changed to 'fml'
Type: Dedicated Server (map_server.txt)
[/embed]
Again, not sure how to actually properly integrate that block break api. Kinda noob at this