diff --git a/src/java/com/threerings/presents/server/PresentsClient.java b/src/java/com/threerings/presents/server/PresentsClient.java
index cfd2ddec4..11f138c55 100644
--- a/src/java/com/threerings/presents/server/PresentsClient.java
+++ b/src/java/com/threerings/presents/server/PresentsClient.java
@@ -23,6 +23,7 @@ package com.threerings.presents.server;
 
 import java.io.IOException;
 import java.net.InetAddress;
+import java.util.Date;
 import java.util.Map;
 import java.util.TimeZone;
 
@@ -30,7 +31,8 @@ import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import com.google.inject.Inject;
 
-import com.samskivert.util.HashIntMap;
+import com.samskivert.util.IntMap;
+import com.samskivert.util.IntMaps;
 import com.samskivert.util.ResultListener;
 import com.samskivert.util.Throttle;
 import com.threerings.util.Name;
@@ -555,8 +557,10 @@ public class PresentsClient
         }
         if (rec != null) {
             rec.unsubscribe();
+            _subhist.put(oid, "Unmapped at " + new Date()); // TEMP
         } else {
-            log.warning("Missing subscription in unmap [client=" + this + ", oid=" + oid + "].");
+            log.warning("Missing subscription in unmap", "client", this, "oid", oid,
+                        "history", _subhist.get(oid));
         }
     }
 
@@ -566,12 +570,13 @@ public class PresentsClient
      */
     protected void clearSubscrips (boolean verbose)
     {
+        String now = new Date().toString();
         for (ClientProxy rec : _subscrips.values()) {
             if (verbose) {
-                log.info("Clearing subscription [client=" + this +
-                         ", obj=" + rec.object.getOid() + "].");
+                log.info("Clearing subscription", "client", this, "obj", rec.object.getOid());
             }
             rec.unsubscribe();
+            _subhist.put(rec.object.getOid(), "Cleared at " + now); // TEMP
         }
         _subscrips.clear();
     }
@@ -855,6 +860,7 @@ public class PresentsClient
                 synchronized (_subscrips) {
                     // make a note of this new subscription
                     _subscrips.put(dobj.getOid(), this);
+                    _subhist.put(dobj.getOid(), "Mapped at " + new Date()); // TEMP
                 }
                 subscribedToObject(dobj);
 
@@ -1003,7 +1009,8 @@ public class PresentsClient
     protected Name _username;
     protected Connection _conn;
     protected ClientObject _clobj;
-    protected HashIntMap<ClientProxy> _subscrips = new HashIntMap<ClientProxy>();
+    protected IntMap<ClientProxy> _subscrips = IntMaps.newHashIntMap();
+    protected IntMap<String> _subhist = IntMaps.newHashIntMap(); // TEMP
     protected ClassLoader _loader;
 
     /** The time at which this client started their session. */