diff --git a/src/fr/neatmonster/nocheatplus/checks/chat/ChatConfig.java b/src/fr/neatmonster/nocheatplus/checks/chat/ChatConfig.java
index b3043028..b3f910af 100644
--- a/src/fr/neatmonster/nocheatplus/checks/chat/ChatConfig.java
+++ b/src/fr/neatmonster/nocheatplus/checks/chat/ChatConfig.java
@@ -71,8 +71,8 @@ public class ChatConfig implements CheckConfig {
     public final ActionList   colorActions;
     
     public final boolean      globalChatCheck;
-	public double             globalChatFrequencyFactor;
-	public final double       globalChatFrequencyWeight;
+	public final float        globalChatFrequencyFactor;
+	public final float        globalChatFrequencyWeight;
 	public final double       globalChatLevel;
     public final ActionList   globalChatActions;
 
@@ -143,8 +143,8 @@ public class ChatConfig implements CheckConfig {
         colorActions = data.getActionList(ConfPaths.CHAT_COLOR_ACTIONS, Permissions.CHAT_COLOR);
         
         globalChatCheck = data.getBoolean(ConfPaths.CHAT_GLOBALCHAT_CHECK);
-        globalChatFrequencyFactor = data.getDouble(ConfPaths.CHAT_GLOBALCHAT_FREQUENCY_FACTOR);
-        globalChatFrequencyWeight = data.getDouble(ConfPaths.CHAT_GLOBALCHAT_FREQUENCY_WEIGHT);
+        globalChatFrequencyFactor = (float) data.getDouble(ConfPaths.CHAT_GLOBALCHAT_FREQUENCY_FACTOR);
+        globalChatFrequencyWeight = (float) data.getDouble(ConfPaths.CHAT_GLOBALCHAT_FREQUENCY_WEIGHT);
     	globalChatLevel = data.getDouble(ConfPaths.CHAT_GLOBALCHAT_LEVEL);
         globalChatActions = data.getActionList(ConfPaths.CHAT_GLOBALCHAT_ACTIONS, Permissions.CHAT_GLOBALCHAT);
 
diff --git a/src/fr/neatmonster/nocheatplus/checks/chat/GlobalChat.java b/src/fr/neatmonster/nocheatplus/checks/chat/GlobalChat.java
index 96d60a47..43329d11 100644
--- a/src/fr/neatmonster/nocheatplus/checks/chat/GlobalChat.java
+++ b/src/fr/neatmonster/nocheatplus/checks/chat/GlobalChat.java
@@ -19,10 +19,13 @@ public class GlobalChat extends Check{
 	}
 
 	/**
-	 * 
+	 * Start analysis.
 	 * @param player
+	 *   		The player who issued the message.
 	 * @param message
-	 * @param captcha Used for starting captcha on failure.
+	 * 			The message to check.
+	 * @param captcha 
+	 * 			Used for starting captcha on failure, if configured so.
 	 * @return
 	 */
 	public boolean check(final Player player, final String message, final ICaptcha captcha) {
@@ -40,6 +43,15 @@ public class GlobalChat extends Check{
 		}	
 	}
 
+	/**
+	 * Check without further synchronization.
+	 * @param player
+	 * @param message
+	 * @param captcha
+	 * @param cc
+	 * @param data
+	 * @return
+	 */
 	private boolean unsafeCheck(final Player player, final String message, final ICaptcha captcha,
 			final ChatConfig cc, final ChatData data) {
 		// Take time once:
@@ -47,14 +59,21 @@ public class GlobalChat extends Check{
 				
 		boolean cancel = false;
 		
-		data.globalChatFrequency.add(time);
-		double score = cc.globalChatFrequencyWeight * data.globalChatFrequency.getScore(cc.globalChatFrequencyFactor);
-		if (score < 2.0 * cc.globalChatFrequencyWeight) 
+		// Update the frequency interval weights.
+		data.globalChatFrequency.update(time);
+		double score = 0;
+		if (score < cc.globalChatFrequencyWeight)
 			// Reset the VL.
 			data.globalChatVL = 0.0;
 		
+		// Weight of this chat message.
+		float weight = 1.0f;
 		// TODO Core checks....
 		
+		// Add weight to frequency counts.
+		data.globalChatFrequency.add(time, weight);
+		score +=  cc.globalChatFrequencyWeight * data.globalChatFrequency.getScore(cc.globalChatFrequencyFactor);
+				
 		if (score > cc.globalChatLevel){
 			if (captcha.shouldStartCaptcha(cc, data)){
 				captcha.sendNewCaptcha(player, cc, data);
diff --git a/src/fr/neatmonster/nocheatplus/utilities/ActionFrequency.java b/src/fr/neatmonster/nocheatplus/utilities/ActionFrequency.java
index 389dd551..35872b2c 100644
--- a/src/fr/neatmonster/nocheatplus/utilities/ActionFrequency.java
+++ b/src/fr/neatmonster/nocheatplus/utilities/ActionFrequency.java
@@ -12,12 +12,12 @@ public class ActionFrequency {
 	/** Reference time for filling in. */
 	long time = 0;
 	
-	final int[] buckets;
+	final float[] buckets;
 
 	final long durBucket;
 	
 	public ActionFrequency(final int nBuckets, final long durBucket){
-		this.buckets = new int[nBuckets];
+		this.buckets = new float[nBuckets];
 		this.durBucket = durBucket;
 	}
 	
@@ -25,8 +25,9 @@ public class ActionFrequency {
 	 * Update and add.
 	 * @param ts
 	 */
-	public void add(final long now){
+	public void add(final long now, final float amount){
 		update(now);
+		buckets[0] += amount;
 	}
 
 	/**
@@ -38,13 +39,11 @@ public class ActionFrequency {
 		final int shift = (int) ((float) diff / (float) durBucket);
 		if (shift == 0){
 			// No update, just fill in.
-			buckets[0] ++;
 			return; 
 		}
 		else if (shift >= buckets.length){
 			// Clear and fill in (beyond range).
 			clear(now);
-			buckets[0] ++;
 			return;
 		}
 		// Update buckets.
@@ -54,7 +53,6 @@ public class ActionFrequency {
 		for (int i = 0; i < shift; i++){
 			buckets[i] = 0;
 		}
-		buckets[0] ++;
 		// Set time according to bucket duration (!).
 		time += durBucket * shift;
 	}
@@ -72,9 +70,9 @@ public class ActionFrequency {
 	 * @param factor
 	 * @return
 	 */
-	public double getScore(final double factor){
-		double res = buckets[0];
-		double cf = factor;
+	public float getScore(final float factor){
+		float res = buckets[0];
+		float cf = factor;
 		for (int i = 1; i < buckets.length; i++){
 			res += cf * buckets[i];
 			cf *= factor;