diff --git a/src/com/google/bitcoin/core/Block.java b/src/com/google/bitcoin/core/Block.java
index 515f9d3a..9b779a2a 100644
--- a/src/com/google/bitcoin/core/Block.java
+++ b/src/com/google/bitcoin/core/Block.java
@@ -311,7 +311,7 @@ public class Block extends Message {
         //            /  \          /   \
         //          2     3       4      5
         //         / \   / \    /  \   /  \
-        //       t1 t2  t3 t4  t5 t5  t5 t5
+        //       t1 t2  t3 t4  t5 t5  t5  t5
         ArrayList<byte[]> tree = new ArrayList<byte[]>();
         // Start by adding all the hashes of the transactions as leaves of the tree.
         for (Transaction t : transactions) {
diff --git a/src/com/google/bitcoin/examples/PingService.java b/src/com/google/bitcoin/examples/PingService.java
index 5b9aa2ed..1374ead0 100644
--- a/src/com/google/bitcoin/examples/PingService.java
+++ b/src/com/google/bitcoin/examples/PingService.java
@@ -113,9 +113,13 @@ public class PingService {
         if (max > 0) {
             System.out.println("Downloading block chain. " + (max > 1000 ? "This may take a while." : ""));
             long current = max;
+            int lastPercent = 0;
             while (current > 0) {
                 double pct = 100.0 - (100.0 * (current / (double) max));
-                System.out.println(String.format("Chain download %d%% done", (int) pct));
+                if ((int)pct != lastPercent) {
+                    System.out.println(String.format("Chain download %d%% done", (int) pct));
+                    lastPercent = (int) pct;
+                }
                 progress.await(1, TimeUnit.SECONDS);
                 current = progress.getCount();
             }