RedstoneChange event thrown then the redstone *changes* not when it stays the same :D

src/main/java/net/minecraft/server/BlockPressurePlate.java

@@ -114,12 +114,14 @@ public class BlockPressurePlate extends Block {
         }
 
         // CraftBukkit start
+        if (flag != flag1) {
             CraftWorld craftWorld = ((WorldServer) world).getWorld();
             CraftServer server = ((WorldServer) world).getServer();
             CraftBlock block = (CraftBlock) craftWorld.getBlockAt(i, j, k);
             BlockRedstoneEvent eventRedstone = new BlockRedstoneEvent(block, flag ? 1 : 0, flag1 ? 1 : 0);
             server.getPluginManager().callEvent(eventRedstone);
             flag1 = eventRedstone.getNewCurrent() > 0;
+        }
         // CraftBukkit end
 
         if (flag1 && !flag) {