Minecraft crash

---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 17.03.13 10:59
Description: Exception in server tick loop

java.lang.IllegalAccessError: tried to access method ConsoleHelper.getModVersion(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String; from class net.minecraft.entity.player.EntityPlayerMP
    at net.minecraft.entity.player.EntityPlayerMP.getHasForge(jc.java:826)
    at net.minecraft.entity.player.EntityPlayerMP.<clinit>(jc.java:64)
    at net.minecraft.item.ItemInWorldManager.getHasForge(jd.java:497)
    at net.minecraft.item.ItemInWorldManager.<clinit>(jd.java:39)
    at net.minecraft.server.management.ServerConfigurationManager.func_72366_a(ServerConfigurationManager.java:380)
    at net.minecraft.server.integrated.IntegratedServerListenThread.func_71747_b(IntegratedServerListenThread.java:91)
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:674)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:570)
    at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:171)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:468)
    at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)


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: 1.5
    Operating System: Windows 8 (amd64) version 6.2
    Java Version: 1.7.0_17, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 3544372808 bytes (3380 MB) / 4001234944 bytes (3815 MB) up to 5726666752 bytes (5461 MB)
    JVM Flags: 2 total; -Xms2048m -Xmx6144m
    AABB Pool Size: 2882 (161392 bytes; 0 MB) allocated, 2739 (153384 bytes; 0 MB) used
    Suspicious classes: FML and Forge are installed
    IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
    FML: MCP v7.42 FML v5.0.25.586 Minecraft Forge 7.7.0.586 Optifine OptiFine_1.5.0_HD_U_A4 7 mods loaded, 7 mods active
    mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    CodeChickenCore [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    NotEnoughItems [Not Enough Items] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    mod_ReiMinimap [mod_ReiMinimap] ([1.5]ReiMinimap_v3.3_02.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    inventorytweaks [Inventory Tweaks] (InventoryTweaks-1.52.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    Profiler Position: N/A (disabled)
    Vec3 Pool Size: 804 (45024 bytes; 0 MB) allocated, 804 (45024 bytes; 0 MB) used
    Player Count: 0 / 8; []
    Type: Integrated Server (map_client.txt)
    Is Modded: Definitely; Client brand changed to 'forge,fml'