That was too OP. Disarm is 1.5x the rate of 1.2.12 now.

Changelog.txt

@@ -45,7 +45,7 @@ Version 1.3.00-dev
  ! Changed Unarmed to start with a +3 DMG (1 Heart = 2 DMG) bonus from Iron Arm Style to make leveling it more viable
  ! Changed Unarmed to gain bonus damage every 50 skill levels
  ! Changed Unarmed to gain more bonus damage total than before
- ! Changed Unarmed to disarm twice as often as before
+ ! Changed Unarmed to disarm 1.5x more often than before
  ! Changed Tree Feller to take down entire trees
  ! Changed mob spawn tracking to use Unique Entity ID instead of Entity Object
  ! Changed stats command name to mcstats for better plugin compatibility

src/main/java/com/gmail/nossr50/commands/skills/UnarmedCommand.java

@@ -26,7 +26,7 @@ public class UnarmedCommand implements CommandExecutor {
 		float skillvalue = (float) PP.getSkillLevel(SkillType.UNARMED);
 
 		if (PP.getSkillLevel(SkillType.UNARMED) < 1000)
-			percentage = String.valueOf((skillvalue / 2000) * 100);
+			percentage = String.valueOf((skillvalue / 3000) * 100);
 		else
 			percentage = "25";
 

src/main/java/com/gmail/nossr50/skills/Unarmed.java

@@ -46,7 +46,7 @@ public class Unarmed {
 		{
 			if(skillLevel >= 1000)
 			{
-				if(Math.random() * 2000 <= 1000)
+				if(Math.random() * 3000 <= 1000)
 				{
 	    			ItemStack item = defender.getItemInHand();
 	    			if(item != null)
@@ -59,7 +59,7 @@ public class Unarmed {
 	    	} 
 			else
     		{
-				if(Math.random() * 2000 <= skillLevel)
+				if(Math.random() * 3000 <= skillLevel)
 				{
 	    			ItemStack item = defender.getItemInHand();
 	    			if(item != null)