Clearing the queue when they are disconnected might actually fix some issues.

CraftBukkit-Patches/0026-Netty.patch

@@ -1,4 +1,4 @@
-From beb9da65b2dc609c0bbc2a89e673a5556e64e832 Mon Sep 17 00:00:00 2001
+From 42978807473eb106e90adf9554dd76dfeb494f40 Mon Sep 17 00:00:00 2001
 From: md_5 <md_5@live.com.au>
 Date: Sun, 3 Feb 2013 10:24:33 +1100
 Subject: [PATCH] Netty
@@ -199,7 +199,7 @@ index 0000000..cfc0535
 +}
 diff --git a/src/main/java/org/spigotmc/netty/NettyNetworkManager.java b/src/main/java/org/spigotmc/netty/NettyNetworkManager.java
 new file mode 100644
-index 0000000..a16e343
+index 0000000..2ab0271
 --- /dev/null
 +++ b/src/main/java/org/spigotmc/netty/NettyNetworkManager.java
 @@ -0,0 +1,203 @@
@@ -225,7 +225,6 @@ index 0000000..a16e343
 +import net.minecraft.server.PendingConnection;
 +import net.minecraft.server.PlayerConnection;
 +import org.bouncycastle.crypto.BufferedBlockCipher;
-+import org.bukkit.Bukkit;
 +
 +/**
 + * This class forms the basis of the Netty integration. It implements
@@ -349,6 +348,7 @@ index 0000000..a16e343
 +    public void b() {
 +        for (int i = 1000; !syncPackets.isEmpty() && i >= 0; i--) {
 +            if (handler instanceof PendingConnection ? ((PendingConnection) handler).c : ((PlayerConnection) handler).disconnected) {
++                syncPackets.clear();
 +                break;
 +            }
 +