diff --git a/fml/build.xml b/fml/build.xml
index 76344da21..54644aeb4 100644
--- a/fml/build.xml
+++ b/fml/build.xml
@@ -35,6 +35,9 @@
     <condition property="mcp.exists">
       <available file="${mcp.home}/runtime/commands.py"/>
     </condition>
+  	<condition property="signature.exists">
+        <available file="${env.JENKINS_HOME}/fmlsigned.properties"/>
+  	</condition>
     <property name="mcp.obfoutput" location="${mcp.home}/reobf" />
     <property name="client.mcp.obfoutput" location="${mcp.obfoutput}/minecraft" />
     <property name="mcp.srcdir" location="${mcp.home}/src" />
@@ -71,7 +74,7 @@
       <arg value="-f" />
     </exec>
   </target>
-  
+
   <target name="clean" depends="buildenvsetup,makeclean" if="mcp.exists">
     <exec executable="${python.exe}" dir="${mcp.home}">
       <arg value="${basedir}/decompile.py" />
@@ -198,7 +201,7 @@
 
   <target name="build" depends="buildenvsetup,merge-client,merge-common,build-universal,build-source-pack" />
 
-  <target name="jenkinsbuild" depends="buildenvsetup,jenkinsfmldecompile,patch,build"/>
+  <target name="jenkinsbuild" depends="buildenvsetup,jenkinsfmldecompile,patch,build,signjar"/>
 
   <target name="patch" depends="buildenvsetup">
     <exec executable="${python.exe}" dir="${basedir}">
@@ -334,4 +337,12 @@
       <fileset dir="${tmp.mcp.srcdir}"/>
     </move>
   </target>
+  <target name="signjar" depends="buildenvsetup,makeversion" if="signature.exists">
+    <condition property="universal.jarname" value="${modname}-universal-${version.minecraft}-${version}" else="${modname}-universal-${version.minecraft}-${version}-${version.branch}">
+      <equals arg1="${version.branch}" arg2="master" />
+    </condition>
+  	<property file="${env.JENKINS_HOME}/fmlsigned.properties" prefix="sign"/>
+  	<echo>${env.JENKINS_HOME} ${universal.jarname} ${sign.KEYPASS}</echo>
+  	<signjar alias="FML" jar="${basedir}/target/${universal.jarname}.zip" keypass="${sign.KEYPASS}" keystore="${env.JENKINS_HOME}/${sign.KEYSTORE}" storepass="${sign.STOREPASS}" verbose="true"/>
+  </target>
 </project>
diff --git a/fml/common/cpw/mods/fml/common/FMLModContainer.java b/fml/common/cpw/mods/fml/common/FMLModContainer.java
index 334baad12..fe19417c9 100644
--- a/fml/common/cpw/mods/fml/common/FMLModContainer.java
+++ b/fml/common/cpw/mods/fml/common/FMLModContainer.java
@@ -52,6 +52,7 @@ import cpw.mods.fml.common.event.FMLConstructionEvent;
 import cpw.mods.fml.common.event.FMLEvent;
 import cpw.mods.fml.common.event.FMLInitializationEvent;
 import cpw.mods.fml.common.event.FMLInterModComms.IMCEvent;
+import cpw.mods.fml.common.event.FMLFingerprintViolationEvent;
 import cpw.mods.fml.common.event.FMLPostInitializationEvent;
 import cpw.mods.fml.common.event.FMLPreInitializationEvent;
 import cpw.mods.fml.common.event.FMLServerStartedEvent;
diff --git a/fml/common/cpw/mods/fml/common/asm/FMLSanityChecker.java b/fml/common/cpw/mods/fml/common/asm/FMLSanityChecker.java
index 6b075bd99..01ce04f47 100644
--- a/fml/common/cpw/mods/fml/common/asm/FMLSanityChecker.java
+++ b/fml/common/cpw/mods/fml/common/asm/FMLSanityChecker.java
@@ -20,7 +20,8 @@ import cpw.mods.fml.relauncher.RelaunchClassLoader;
 
 public class FMLSanityChecker implements IFMLCallHook
 {
-    private static final String FMLFINGERPRINT = "EE:E2:73:7A:8B:90:5F:7D:C6:02:D5:B7:23:9F:B6:29:C2:18:0F:3E".toLowerCase().replace(":","");
+    private static final String FMLFINGERPRINT = "AE:F6:54:79:96:E9:1B:D1:59:70:6C:B4:6B:F5:4A:89:C5:CE:08:1D".toLowerCase().replace(":","");
+    private static final String FORGEFINGERPRINT = "".toLowerCase().replace(":", "");
     static class MLDetectorClassVisitor extends ClassVisitor
     {
         private boolean foundMarker = false;
@@ -59,6 +60,11 @@ public class FMLSanityChecker implements IFMLCallHook
                     FMLLog.info("Found valid fingerprint for FML: %s", fingerprint);
                     goodFML = true;
                 }
+                else if (fingerprint.equals(FORGEFINGERPRINT))
+                {
+                    FMLLog.info("Found valid fingerprint for Minecraft Forge: %s", fingerprint);
+                    goodFML = true;
+                }
                 else
                 {
                     FMLLog.severe("Found invalid fingerprint for FML: %s", fingerprint);
@@ -71,7 +77,7 @@ public class FMLSanityChecker implements IFMLCallHook
         }
         if (!goodFML)
         {
-            FMLLog.severe("FML appears to be missing it's signature data. This is not a good thing");
+            FMLLog.severe("FML appears to be missing any signature data. This is not a good thing");
         }
         byte[] mlClass = cl.getClassBytes("ModLoader");
         // Only care in obfuscated env
diff --git a/fml/common/cpw/mods/fml/common/FMLFingerprintViolationEvent.java b/fml/common/cpw/mods/fml/common/event/FMLFingerprintViolationEvent.java
similarity index 88%
rename from fml/common/cpw/mods/fml/common/FMLFingerprintViolationEvent.java
rename to fml/common/cpw/mods/fml/common/event/FMLFingerprintViolationEvent.java
index b292a433a..c5d98747e 100644
--- a/fml/common/cpw/mods/fml/common/FMLFingerprintViolationEvent.java
+++ b/fml/common/cpw/mods/fml/common/event/FMLFingerprintViolationEvent.java
@@ -1,4 +1,4 @@
-package cpw.mods.fml.common;
+package cpw.mods.fml.common.event;
 
 import java.io.File;
 import java.util.List;
@@ -6,7 +6,6 @@ import java.util.Set;
 
 import com.google.common.collect.ImmutableSet;
 
-import cpw.mods.fml.common.event.FMLEvent;
 
 public class FMLFingerprintViolationEvent extends FMLEvent {
 
diff --git a/fml/mc_versions.cfg b/fml/mc_versions.cfg
index 5741350a0..a37da90d0 100644
--- a/fml/mc_versions.cfg
+++ b/fml/mc_versions.cfg
@@ -1,5 +1,5 @@
 [default]
-current_ver = 1.4.5
+current_ver = 1.4.6
 base_url    = http://s3.amazonaws.com/MinecraftDownload/
 libraries   = lwjgl.jar lwjgl_util.jar jinput.jar
 natives     = windows_natives.jar macosx_natives.jar linux_natives.jar
@@ -21,3 +21,13 @@ server_md5 = 250654ceae7a26ba955a30095d90a475
 mcp_ver    = 7.23
 mcp_url    = http://mcp.ocean-labs.de/files/archive/mcp723.zip
 mcp_md5    = 9fbb5835b437b64bc5ce618fa5a53d1d
+
+[1.4.6]
+client_url = http://assets.minecraft.net/1_4_6/minecraft.jar
+server_url = http://assets.minecraft.net/1_4_6/minecraft_server.jar
+client_md5 = 48677dc4c2b98c29918722b5ab27b4fd
+server_md5 = b0700fa969dbf0ff085082cde87384d2
+mcp_ver    = 7.24
+mcp_url    = http://mcp.ocean-labs.de/files/archive/mcp724.zip
+mcp_md5    = 9fbb5835b437b64bc5ce618fa5a53d1d
+