Index: src/game/g_local.h
===================================================================
--- src/game/g_local.h	(revision 771)
+++ src/game/g_local.h	(working copy)
@@ -333,6 +333,7 @@
   weapon_t            humanItemSelection; //TA: humans have a starting item
   pTeam_t             teamSelection;      //TA: player team (copied to ps.stats[ STAT_PTEAM ])
 
+  int                 teamChangeTime;     //tjw: level.time of last team change
   qboolean            joinedATeam;        //TA: used to tell when a PTR code is valid
   connectionRecord_t  *connection;
 
Index: src/game/g_cmds.c
===================================================================
--- src/game/g_cmds.c	(revision 771)
+++ src/game/g_cmds.c	(working copy)
@@ -465,14 +465,38 @@
     else if( oldTeam == PTE_HUMANS )
       G_RemoveFromSpawnQueue( &level.humanSpawnQueue, ent->client->ps.clientNum );
 
-    level.bankCredits[ ent->client->ps.clientNum ] = 0;
-    ent->client->ps.persistant[ PERS_CREDIT ] = 0;
-    ent->client->ps.persistant[ PERS_SCORE ] = 0;
+    // tjw: tranfer credits and kills as long as this player has been on the
+    //      same team for at least 5 minutes.  this is done to provide
+    //      a penalty for switching teams for reconnaissance.
+    if( ( oldTeam == PTE_HUMANS || oldTeam == PTE_ALIENS )
+      && ( level.time - ent->client->pers.teamChangeTime ) > 300000 )
+    {
+      if( oldTeam == PTE_HUMANS )
+      {
+        ent->client->ps.persistant[ PERS_CREDIT ] *= 
+          (float)FREEKILL_ALIEN / FREEKILL_HUMAN;
+      }
+      else if( oldTeam == PTE_ALIENS )
+      {
+        ent->client->ps.persistant[ PERS_CREDIT ] *= 
+          (float)FREEKILL_HUMAN / FREEKILL_ALIEN;
+      }
+    }
+    else
+    {
+      ent->client->ps.persistant[ PERS_CREDIT ] = 0;
+      ent->client->ps.persistant[ PERS_SCORE ] = 0;
+    }
+
+    // tjw: no longer used
+    //level.bankCredits[ ent->client->ps.clientNum ] = 0;
+
     ent->client->pers.classSelection = PCL_NONE;
     ClientSpawn( ent, NULL, NULL, NULL );
   }
 
   ent->client->pers.joinedATeam = qtrue;
+  ent->client->pers.teamChangeTime = level.time;
 
   //update ClientInfo
   ClientUserinfoChanged( ent->client->ps.clientNum );