diff --git a/src/as/com/threerings/presents/client/ClientDObjectMgr.as b/src/as/com/threerings/presents/client/ClientDObjectMgr.as
index 480d64add..180937907 100644
--- a/src/as/com/threerings/presents/client/ClientDObjectMgr.as
+++ b/src/as/com/threerings/presents/client/ClientDObjectMgr.as
@@ -76,7 +76,7 @@ public class ClientDObjectMgr
         _flushInterval.addEventListener(TimerEvent.TIMER, flushObjects);
         _flushInterval.start();
 
-        _actionInterval = new Timer(1); //TODO!
+        _actionInterval = new Timer(500); //TODO!
         _actionInterval.addEventListener(TimerEvent.TIMER, processNextAction);
         _actionInterval.start();
     }
diff --git a/src/as/com/threerings/presents/client/Communicator.as b/src/as/com/threerings/presents/client/Communicator.as
index 0137cee8a..b1557186d 100644
--- a/src/as/com/threerings/presents/client/Communicator.as
+++ b/src/as/com/threerings/presents/client/Communicator.as
@@ -10,6 +10,8 @@ import flash.net.Socket;
 import flash.util.ByteArray;
 import flash.util.Endian;
 
+import com.threerings.util.Util;
+
 import com.threerings.io.FrameAvailableEvent;
 import com.threerings.io.FrameReader;
 import com.threerings.io.ObjectInputStream;
@@ -90,6 +92,8 @@ public class Communicator
         // write the message (ends up in _outBuffer)
         _outStream.writeObject(msg);
 
+        trace("outBuffer: " + Util.bytesToString(_outBuffer));
+
         // frame it by writing the length, then the bytes
         _socket.writeInt(_outBuffer.length);
         _socket.writeBytes(_outBuffer);
diff --git a/src/as/com/threerings/presents/dobj/DEvent.as b/src/as/com/threerings/presents/dobj/DEvent.as
index 525519add..a0c1bfd6d 100644
--- a/src/as/com/threerings/presents/dobj/DEvent.as
+++ b/src/as/com/threerings/presents/dobj/DEvent.as
@@ -9,7 +9,7 @@ import com.threerings.io.Streamable;
 
 import com.threerings.util.Comparable;
 
-public class DEvent
+public /* abstract */ class DEvent
     implements Streamable
 {
     public function DEvent (targetOid :int)
diff --git a/src/as/com/threerings/presents/dobj/NamedEvent.as b/src/as/com/threerings/presents/dobj/NamedEvent.as
index de1347ac9..aca8a9b42 100644
--- a/src/as/com/threerings/presents/dobj/NamedEvent.as
+++ b/src/as/com/threerings/presents/dobj/NamedEvent.as
@@ -9,7 +9,7 @@ import com.threerings.io.ObjectOutputStream;
  * A common parent class for all events that are associated with a name
  * (in some cases a field name, in other cases just an identifying name).
  */
-public class NamedEvent extends DEvent
+public /* abstract */ class NamedEvent extends DEvent
 {
     /**
      * Constructs a new named event for the specified target object with
diff --git a/src/as/com/threerings/presents/net/Credentials.as b/src/as/com/threerings/presents/net/Credentials.as
index d3a5c462c..6c705dc1e 100644
--- a/src/as/com/threerings/presents/net/Credentials.as
+++ b/src/as/com/threerings/presents/net/Credentials.as
@@ -8,7 +8,7 @@ import com.threerings.io.ObjectInputStream;
 import com.threerings.io.ObjectOutputStream;
 import com.threerings.io.Streamable;
 
-public class Credentials
+public /* abstract */ class Credentials
     implements Streamable
 {
     public function Credentials (username :Name)
diff --git a/src/as/com/threerings/presents/net/DownstreamMessage.as b/src/as/com/threerings/presents/net/DownstreamMessage.as
index 101d989cf..866a002e9 100644
--- a/src/as/com/threerings/presents/net/DownstreamMessage.as
+++ b/src/as/com/threerings/presents/net/DownstreamMessage.as
@@ -6,7 +6,7 @@ import com.threerings.io.ObjectInputStream;
 import com.threerings.io.ObjectOutputStream;
 import com.threerings.io.Streamable;
 
-public class DownstreamMessage
+public /* abstract */ class DownstreamMessage
     implements Streamable
 {
     /** The message id of the upstream message with which this downstream
diff --git a/src/as/com/threerings/presents/net/UpstreamMessage.as b/src/as/com/threerings/presents/net/UpstreamMessage.as
index 6096693ad..831d15799 100644
--- a/src/as/com/threerings/presents/net/UpstreamMessage.as
+++ b/src/as/com/threerings/presents/net/UpstreamMessage.as
@@ -8,7 +8,7 @@ import com.threerings.io.ObjectOutputStream;
 
 import com.threerings.util.JavaConstants;
 
-public class UpstreamMessage
+public /* abstract */ class UpstreamMessage
     implements Streamable
 {
     /** This is a unique (within the context of a reasonable period
diff --git a/src/as/com/threerings/util/Util.as b/src/as/com/threerings/util/Util.as
new file mode 100644
index 000000000..587574cbf
--- /dev/null
+++ b/src/as/com/threerings/util/Util.as
@@ -0,0 +1,21 @@
+package com.threerings.util {
+
+import flash.util.ByteArray;
+import flash.util.StringBuilder;
+
+public class Util
+{
+    public static function bytesToString (bytes :ByteArray) :String
+    {
+        var buf :StringBuilder = new StringBuilder();
+        for (var ii :int = 0; ii < bytes.length; ii++) {
+            var b :int = bytes[ii];
+            buf.append(HEX[b >> 4], HEX[b & 0xF]);
+        }
+        return buf.toString();
+    }
+
+    private static const HEX :Array = new Array("0", "1", "2", "3", "4", "5",
+            "6", "7", "8", "9", "A", "B", "C", "D", "E", "F");
+}
+}