--- ../src-base/minecraft/net/minecraft/tileentity/TileEntitySign.java
+++ ../src-work/minecraft/net/minecraft/tileentity/TileEntitySign.java
@@ -11,7 +11,7 @@
 {
     public String[] signText = new String[] {"", "", "", ""};
     public int lineBeingEdited = -1;
-    private boolean field_145916_j = true;
+    public boolean field_145916_j = true; // CraftBukkit - private -> public
     private EntityPlayer field_145917_k;
     private static final String __OBFID = "CL_00000363";
 
@@ -43,7 +43,19 @@
     public Packet getDescriptionPacket()
     {
         String[] astring = new String[4];
-        System.arraycopy(this.signText, 0, astring, 0, 4);
+
+        // CraftBukkit start - Limit sign text to 15 chars per line
+        for (int i = 0; i < 4; ++i)
+        {
+            astring[i] = this.signText[i];
+
+            if (this.signText[i].length() > 15)
+            {
+                astring[i] = this.signText[i].substring(0, 15);
+            }
+        }
+
+        // CraftBukkit end
         return new S33PacketUpdateSign(this.xCoord, this.yCoord, this.zCoord, astring);
     }
 
@@ -72,4 +84,26 @@
     {
         return this.field_145917_k;
     }
+
+    // CraftBukkit start - central method to limit sign text to 15 chars per line
+    public static String[] sanitizeLines(String[] lines) {
+        String[] astring = new String[4];
+        for (int i = 0; i < 4; ++i) {
+            astring[i] = lines[i];
+
+            if (lines[i].length() > 15) {
+                astring[i] = lines[i].substring(0, 15);
+            }
+        }
+        return astring;
+    }
+    // CraftBukkit end
+
+    // Cauldron start
+    @Override
+    public boolean canUpdate()
+    {
+        return false;
+    }
+    // Cauldron end
 }