diff --git a/src/d_net.cpp b/src/d_net.cpp
index b2742871..27af76c8 100644
--- a/src/d_net.cpp
+++ b/src/d_net.cpp
@@ -592,13 +592,16 @@ void PlayerIsGone (int netnode, int netconsole)
 		Printf ("%s left the game\n", players[netconsole].userinfo.netname);
 	}
 
-	// [RH] Revert to your own view if spying through the player who left
-	if (players[consoleplayer].camera == players[netconsole].mo)
+	// [RH] Revert each player to their own view if spying through the player who left
+	for (int ii = 0; ii < MAXPLAYERS; ++ii)
 	{
-		players[consoleplayer].camera = players[consoleplayer].mo;
-		if (StatusBar != NULL)
+		if (playeringame[ii] && players[ii].camera == players[netconsole].mo)
 		{
-			StatusBar->AttachToPlayer (&players[consoleplayer]);
+			players[ii].camera = players[ii].mo;
+			if (ii == consoleplayer && StatusBar != NULL)
+			{
+				StatusBar->AttachToPlayer (&players[ii]);
+			}
 		}
 	}
 
@@ -2460,6 +2463,10 @@ void Net_DoCommand (int type, BYTE **stream, int player)
 		F_AdvanceIntermission();
 		break;
 
+	case DEM_REVERTCAMERA:
+		players[player].camera = players[player].mo;
+		break;
+
 	default:
 		I_Error ("Unknown net command: %d", type);
 		break;
diff --git a/src/d_protocol.h b/src/d_protocol.h
index 22461010..cee2fca6 100644
--- a/src/d_protocol.h
+++ b/src/d_protocol.h
@@ -162,6 +162,7 @@ enum EDemoCommand
 	DEM_SETPITCHLIMIT,	// 63 Byte: Up limit, Byte: Down limit (in degrees)
 	DEM_ADVANCEINTER,	// 64 Advance intermission screen state
 	DEM_RUNNAMEDSCRIPT,	// 65 String: Script name, Byte: Arg count + Always flag; each arg is a 4-byte int
+	DEM_REVERTCAMERA,	// 66
 };
 
 // The following are implemented by cht_DoCheat in m_cheat.cpp
diff --git a/src/g_game.cpp b/src/g_game.cpp
index ee8092b7..a090dd64 100644
--- a/src/g_game.cpp
+++ b/src/g_game.cpp
@@ -831,7 +831,12 @@ static void ChangeSpy (bool forward)
 	// If not viewing through a player, return your eyes to your own head.
 	if (players[consoleplayer].camera->player == NULL)
 	{
-		players[consoleplayer].camera = players[consoleplayer].mo;
+		// When watching demos, you will just have to wait until your player
+		// has done this for you, since it could desync otherwise.
+		if (!demoplayback)
+		{
+			Net_WriteByte(DEM_REVERTCAMERA);
+		}
 		return;
 	}
 
diff --git a/src/g_level.cpp b/src/g_level.cpp
index 9e874c5d..903a9a6c 100644
--- a/src/g_level.cpp
+++ b/src/g_level.cpp
@@ -920,10 +920,13 @@ void G_DoLoadLevel (int position, bool autosave)
 	level.starttime = gametic;
 	G_UnSnapshotLevel (!savegamerestore);	// [RH] Restore the state of the level.
 	G_FinishTravel ();
-	if (players[consoleplayer].camera == NULL ||
-		players[consoleplayer].camera->player != NULL)
-	{ // If we are viewing through a player, make sure it is us.
-        players[consoleplayer].camera = players[consoleplayer].mo;
+	// For each player, if they are viewing through a player, make sure it is themselves.
+	for (int ii = 0; i < MAXPLAYERS; ++i)
+	{
+		if (playeringame[ii] && (players[ii].camera == NULL || players[ii].camera->player != NULL))
+		{
+			players[ii].camera = players[ii].mo;
+		}
 	}
 	StatusBar->AttachToPlayer (&players[consoleplayer]);
 	P_DoDeferedScripts ();	// [RH] Do script actions that were triggered on another map.
@@ -1143,6 +1146,7 @@ void G_FinishTravel ()
 			pawn->target = NULL;
 			pawn->lastenemy = NULL;
 			pawn->player->mo = pawn;
+			pawn->player->camera = pawn;
 			DObject::StaticPointerSubstitution (oldpawn, pawn);
 			oldpawn->Destroy();
 			pawndup->Destroy ();
diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index 78207595..96c30c8f 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -5255,6 +5255,9 @@ int DLevelScript::RunScript ()
 			STACK(1) = !STACK(1);
 			break;
 
+
+
+
 		case PCD_NEGATEBINARY:
 			STACK(1) = ~STACK(1);
 			break;
@@ -7400,11 +7403,11 @@ static void addDefered (level_info_t *i, acsdefered_t::EType type, int script, c
 		def->next = i->defered;
 		def->type = type;
 		def->script = script;
-		for (j = 0; j < countof(def->args) && j < argcount; ++j)
+		for (j = 0; (size_t)j < countof(def->args) && j < argcount; ++j)
 		{
 			def->args[j] = args[j];
 		}
-		while (j < countof(def->args))
+		while ((size_t)j < countof(def->args))
 		{
 			def->args[j++] = 0;
 		}
diff --git a/src/p_conversation.cpp b/src/p_conversation.cpp
index ad637c39..3ecd4f5f 100644
--- a/src/p_conversation.cpp
+++ b/src/p_conversation.cpp
@@ -720,7 +720,7 @@ public:
 			toSay = GStrings[dlgtext];
 			if (toSay == NULL)
 			{
-				toSay = "Go away!";	// Ok, it's lame - but it doesn't look like an error to the player. ;)
+				toSay = GStrings["TXT_GOAWAY"];	// Ok, it's lame - but it doesn't look like an error to the player. ;)
 			}
 		}
 		else
diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index 3d676cdd..c9ed7e30 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -4051,9 +4051,12 @@ APlayerPawn *P_SpawnPlayer (FMapThing *mthing, bool tempplayer)
 
 	p->velx = p->vely = 0;		// killough 10/98: initialize bobbing to 0.
 
-	if (players[consoleplayer].camera == oldactor)
+	for (int ii = 0; ii < MAXPLAYERS; ++ii)
 	{
-		players[consoleplayer].camera = mobj;
+		if (playeringame[ii] && players[ii].camera == oldactor)
+		{
+			players[ii].camera = oldactor;
+		}
 	}
 
 	// [RH] Allow chasecam for demo watching
diff --git a/src/p_user.cpp b/src/p_user.cpp
index de48cf20..1e5dd2bd 100644
--- a/src/p_user.cpp
+++ b/src/p_user.cpp
@@ -326,21 +326,25 @@ size_t player_t::FixPointers (const DObject *old, DObject *rep)
 {
 	APlayerPawn *replacement = static_cast<APlayerPawn *>(rep);
 	size_t changed = 0;
-	if (mo == old)				mo = replacement, changed++;
-	if (poisoner == old)		poisoner = replacement, changed++;
-	if (attacker == old)		attacker = replacement, changed++;
-	if (camera == old)			camera = replacement, changed++;
-	if (dest == old)			dest = replacement, changed++;
-	if (prev == old)			prev = replacement, changed++;
-	if (enemy == old)			enemy = replacement, changed++;
-	if (missile == old)			missile = replacement, changed++;
-	if (mate == old)			mate = replacement, changed++;
-	if (last_mate == old)		last_mate = replacement, changed++;
-	if (ReadyWeapon == old)		ReadyWeapon = static_cast<AWeapon *>(rep), changed++;
-	if (PendingWeapon == old)	PendingWeapon = static_cast<AWeapon *>(rep), changed++;
-	if (PremorphWeapon == old)	PremorphWeapon = static_cast<AWeapon *>(rep), changed++;
-	if (ConversationNPC == old)	ConversationNPC = replacement, changed++;
-	if (ConversationPC == old)	ConversationPC = replacement, changed++;
+
+	// The construct *& is used in several of these to avoid the read barriers
+	// that would turn the pointer we want to check to NULL if the old object
+	// is pending deletion.
+	if (mo == old)					mo = replacement, changed++;
+	if (*&poisoner == old)			poisoner = replacement, changed++;
+	if (*&attacker == old)			attacker = replacement, changed++;
+	if (*&camera == old)			camera = replacement, changed++;
+	if (*&dest == old)				dest = replacement, changed++;
+	if (*&prev == old)				prev = replacement, changed++;
+	if (*&enemy == old)				enemy = replacement, changed++;
+	if (*&missile == old)			missile = replacement, changed++;
+	if (*&mate == old)				mate = replacement, changed++;
+	if (*&last_mate == old)			last_mate = replacement, changed++;
+	if (ReadyWeapon == old)			ReadyWeapon = static_cast<AWeapon *>(rep), changed++;
+	if (PendingWeapon == old)		PendingWeapon = static_cast<AWeapon *>(rep), changed++;
+	if (*&PremorphWeapon == old)	PremorphWeapon = static_cast<AWeapon *>(rep), changed++;
+	if (*&ConversationNPC == old)	ConversationNPC = replacement, changed++;
+	if (*&ConversationPC == old)	ConversationPC = replacement, changed++;
 	return changed;
 }
 
diff --git a/src/svnrevision.h b/src/svnrevision.h
index 18cda2db..f86a42e8 100644
--- a/src/svnrevision.h
+++ b/src/svnrevision.h
@@ -3,5 +3,5 @@
 // This file was automatically generated by the
 // updaterevision tool. Do not edit by hand.
 
-#define ZD_SVN_REVISION_STRING "3446"
-#define ZD_SVN_REVISION_NUMBER 3446
+#define ZD_SVN_REVISION_STRING "3450"
+#define ZD_SVN_REVISION_NUMBER 3450
diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index d2ff8dda..a3288db8 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -2253,7 +2253,20 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_CheckSight)
 
 	for (int i = 0; i < MAXPLAYERS; i++) 
 	{
-		if (playeringame[i] && P_CheckSight(players[i].camera, self, SF_IGNOREVISIBILITY)) return;
+		if (playeringame[i])
+		{
+			// Always check sight from each player.
+			if (P_CheckSight(players[i].mo, self, SF_IGNOREVISIBILITY))
+			{
+				return;
+			}
+			// If a player is viewing from a non-player, then check that too.
+			if (players[i].camera != NULL && players[i].camera->player == NULL &&
+				P_CheckSight(players[i].camera, self, SF_IGNOREVISIBILITY))
+			{
+				return;
+			}
+		}
 	}
 
 	ACTION_JUMP(jump);
@@ -2266,6 +2279,42 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_CheckSight)
 // Useful for maps with many multi-actor special effects.
 //
 //===========================================================================
+static bool DoCheckSightOrRange(AActor *self, AActor *camera, double range)
+{
+	if (camera == NULL)
+	{
+		return false;
+	}
+	// Check distance first, since it's cheaper than checking sight.
+	double dx = self->x - camera->x;
+	double dy = self->y - camera->y;
+	double dz;
+	fixed_t eyez = (camera->z + camera->height - (camera->height>>2));	// same eye height as P_CheckSight
+	if (eyez > self->z + self->height)
+	{
+		dz = self->z + self->height - eyez;
+	}
+	else if (eyez < self->z)
+	{
+		dz = self->z - eyez;
+	}
+	else
+	{
+		dz = 0;
+	}
+	if ((dx*dx) + (dy*dy) + (dz*dz) <= range)
+	{ // Within range
+		return true;
+	}
+
+	// Now check LOS.
+	if (P_CheckSight(camera, self, SF_IGNOREVISIBILITY))
+	{ // Visible
+		return true;
+	}
+	return false;
+}
+
 DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_CheckSightOrRange)
 {
 	ACTION_PARAM_START(2);
@@ -2279,33 +2328,15 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_CheckSightOrRange)
 	{
 		if (playeringame[i])
 		{
-			AActor *camera = players[i].camera;
-
-			// Check distance first, since it's cheaper than checking sight.
-			double dx = self->x - camera->x;
-			double dy = self->y - camera->y;
-			double dz;
-			fixed_t eyez = (camera->z + camera->height - (camera->height>>2));	// same eye height as P_CheckSight
-			if (eyez > self->z + self->height)
+			// Always check from each player.
+			if (DoCheckSightOrRange(self, players[i].mo, range))
 			{
-				dz = self->z + self->height - eyez;
-			}
-			else if (eyez < self->z)
-			{
-				dz = self->z - eyez;
-			}
-			else
-			{
-				dz = 0;
-			}
-			if ((dx*dx) + (dy*dy) + (dz*dz) <= range)
-			{ // Within range
 				return;
 			}
-
-			// Now check LOS.
-			if (P_CheckSight(camera, self, SF_IGNOREVISIBILITY))
-			{ // Visible
+			// If a player is viewing from a non-player, check that too.
+			if (players[i].camera != NULL && players[i].camera->player == NULL &&
+				DoCheckSightOrRange(self, players[i].camera, range))
+			{
 				return;
 			}
 		}
diff --git a/src/version.h b/src/version.h
index bfe7f1fa..9f1a5eb6 100644
--- a/src/version.h
+++ b/src/version.h
@@ -56,7 +56,7 @@
 // Version identifier for network games.
 // Bump it every time you do a release unless you're certain you
 // didn't change anything that will affect sync.
-#define NETGAMEVERSION 226
+#define NETGAMEVERSION 227
 
 // Version stored in the ini's [LastRun] section.
 // Bump it if you made some configuration change that you want to
@@ -66,7 +66,7 @@
 // Protocol version used in demos.
 // Bump it if you change existing DEM_ commands or add new ones.
 // Otherwise, it should be safe to leave it alone.
-#define DEMOGAMEVERSION 0x217
+#define DEMOGAMEVERSION 0x218
 
 // Minimum demo version we can play.
 // Bump it whenever you change or remove existing DEM_ commands.
diff --git a/wadsrc/static/compatibility.txt b/wadsrc/static/compatibility.txt
index dc46fa2f..7b6db270 100644
--- a/wadsrc/static/compatibility.txt
+++ b/wadsrc/static/compatibility.txt
@@ -159,8 +159,9 @@ E2B5D1400279335811C1C1C0B437D9C8 // Deathknights of the Dark Citidel, map54
 
 2B65CB046EA40D2E44576949381769CA // Commercial Doom e3m4
 {
-	// This line is erroneously flagged as a door that monsters can operate.
-	// If they do, they block you off from half the map. Since the attached
-	// sector isn't a door, remove the special.
-	clearlinespecial 1069
+	// This line is erroneously specified as Door_Raise that monsters
+	// can operate. If they do, they block you off from half the map. Change
+	// this into a one-shot Door_Open so that it won't close.
+	setlinespecial 1069 Door_Open 0 16 0 0 0
+	clearlineflags 1069 0x200
 }
diff --git a/wadsrc/static/language.enu b/wadsrc/static/language.enu
index 3acfe404..4c1e4af6 100644
--- a/wadsrc/static/language.enu
+++ b/wadsrc/static/language.enu
@@ -1481,7 +1481,8 @@ TXT_RANDOM_PGUARD_10 = "If there is any honor inside that pathetic shell of a bo
 TXT_RANDOMGOODBYE_1 = "Bye!";
 TXT_RANDOMGOODBYE_2 = "Thanks, bye!";
 TXT_RANDOMGOODBYE_3 = "See you later!";
-TXT_HAVEENOUGH = "You seem to have enough!";
+TXT_HAVEENOUGH		= "You seem to have enough!";
+TXT_GOAWAY			= "Go away!";
 
 // Skills: