diff --git a/src/me/ryanhamshire/GriefPrevention/FlatFileDataStore.java b/src/me/ryanhamshire/GriefPrevention/FlatFileDataStore.java
index db84b68..26db535 100644
--- a/src/me/ryanhamshire/GriefPrevention/FlatFileDataStore.java
+++ b/src/me/ryanhamshire/GriefPrevention/FlatFileDataStore.java
@@ -211,7 +211,7 @@ public class FlatFileDataStore extends DataStore
 						    }
 						    catch(Exception ex)
 						    {
-						        GriefPrevention.AddLogEntry("Failed to look up UUID for player " + ownerName + ".");
+						        GriefPrevention.AddLogEntry("Error - this is not a valid UUID: " + ownerName + ".");
 						        GriefPrevention.AddLogEntry("  Converted land claim to administrative @ " + lesserBoundaryCorner.toString());
 						    }
 						}
diff --git a/src/me/ryanhamshire/GriefPrevention/PlayerEventHandler.java b/src/me/ryanhamshire/GriefPrevention/PlayerEventHandler.java
index 3e1a436..c62aeb6 100644
--- a/src/me/ryanhamshire/GriefPrevention/PlayerEventHandler.java
+++ b/src/me/ryanhamshire/GriefPrevention/PlayerEventHandler.java
@@ -93,6 +93,12 @@ class PlayerEventHandler implements Listener
 		event.setCancelled(this.handlePlayerChat(player, message, event));
 	}
 	
+	//last chat message shown, regardless of who sent it
+	private String lastChatMessage = "";
+	
+	//number of identical messages in a row
+	private int duplicateMessageCount = 0;
+	
 	//returns true if the message should be sent, false if it should be muted 
 	private boolean handlePlayerChat(Player player, String message, PlayerEvent event)
 	{
@@ -144,6 +150,19 @@ class PlayerEventHandler implements Listener
 			}
 		}
 		
+		//always mute an exact match to the last chat message
+		if(message.equals(this.lastChatMessage))
+		{
+		    playerData.spamCount += ++this.duplicateMessageCount;
+		    spam = true;
+		    muted = true;
+		}
+		else
+		{
+		    this.lastChatMessage = message;
+		    this.duplicateMessageCount = 0;
+		}
+		
 		//where other types of spam are concerned, casing isn't significant
 		message = message.toLowerCase();