diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index b76087dfab..39b44e19ed 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,4 +1,8 @@
 October 29, 2009
+- Make TranslateToStartSpot() set the new sector references for a polyobj's
+  walls so that P_CheckSwitchRange() will work with them.
+- Fixed: If P_ActivateLine() failed in P_UseTraverse() it would not play
+  the *usefail sound.
 - Fixed: An unspecified save_dir will now save to the program directory on
   Windows. (Other operating systems already use the user's home directory
   instead.)
diff --git a/src/p_spec.cpp b/src/p_spec.cpp
index 82d91489d1..56ecd5179a 100644
--- a/src/p_spec.cpp
+++ b/src/p_spec.cpp
@@ -293,7 +293,10 @@ bool P_TestActivateLine (line_t *line, AActor *mo, int side, int activationType)
 	}
 	if (activationType == SPAC_Use)
 	{
-		if (!P_CheckSwitchRange(mo, line, side)) return false;
+		if (!P_CheckSwitchRange(mo, line, side))
+		{
+			return false;
+		}
 	}
 
 	if ((lineActivation & activationType) == 0)
@@ -392,7 +395,6 @@ bool P_TestActivateLine (line_t *line, AActor *mo, int side, int activationType)
 //
 void P_PlayerInSpecialSector (player_t *player, sector_t * sector)
 {
-
 	if (sector == NULL)
 	{
 		// Falling, not all the way down yet?
diff --git a/src/p_switch.cpp b/src/p_switch.cpp
index 4e312a1660..25a8788849 100644
--- a/src/p_switch.cpp
+++ b/src/p_switch.cpp
@@ -466,7 +466,8 @@ bool P_CheckSwitchRange(AActor *user, line_t *line, int sideno)
 {
 	// Activated from an empty side -> always succeed
 	side_t *side = line->sidedef[sideno];
-	if (side == NULL) return true;
+	if (side == NULL)
+		return true;
 
 	fixed_t checktop;
 	fixed_t checkbot;
@@ -474,7 +475,8 @@ bool P_CheckSwitchRange(AActor *user, line_t *line, int sideno)
 	FLineOpening open;
 
 	// 3DMIDTEX forces CHECKSWITCHRANGE because otherwise it might cause problems.
-	if (!(line->flags & (ML_3DMIDTEX|ML_CHECKSWITCHRANGE))) return true;
+	if (!(line->flags & (ML_3DMIDTEX|ML_CHECKSWITCHRANGE)))
+		return true;
 
 	// calculate the point where the user would touch the wall.
 	divline_t dll, dlu;
@@ -502,7 +504,8 @@ bool P_CheckSwitchRange(AActor *user, line_t *line, int sideno)
 
 	// Now get the information from the line.
 	P_LineOpening(open, NULL, line, checkx, checky, user->x, user->y);
-	if (open.range <= 0) goto onesided;
+	if (open.range <= 0)
+		goto onesided;
 
 	if ((TryFindSwitch (side, side_t::top)) != -1)
 	{
@@ -516,7 +519,8 @@ bool P_CheckSwitchRange(AActor *user, line_t *line, int sideno)
 	{
 		// 3DMIDTEX lines will force a mid texture check if no switch is found on this line
 		// to keep compatibility with Eternity's implementation.
-		if (!P_GetMidTexturePosition(line, sideno, &checktop, &checkbot)) return false;
+		if (!P_GetMidTexturePosition(line, sideno, &checktop, &checkbot))
+			return false;
 		return user->z < checktop || user->z + user->height > checkbot;
 	}
 	else
diff --git a/src/po_man.cpp b/src/po_man.cpp
index ebafff46fd..828ea951a2 100644
--- a/src/po_man.cpp
+++ b/src/po_man.cpp
@@ -1565,21 +1565,30 @@ static void TranslateToStartSpot (int tag, int originX, int originY)
 			(*tempSeg)->v1->x -= deltaX;
 			(*tempSeg)->v1->y -= deltaY;
 		}
-		avg.x += (*tempSeg)->v1->x>>FRACBITS;
-		avg.y += (*tempSeg)->v1->y>>FRACBITS;
+		avg.x += (*tempSeg)->v1->x >> FRACBITS;
+		avg.y += (*tempSeg)->v1->y >> FRACBITS;
 		// the original Pts are based off the startSpot Pt, and are
 		// unique to each seg, not each linedef
 		tempPt->x = (*tempSeg)->v1->x-po->startSpot[0];
 		tempPt->y = (*tempSeg)->v1->y-po->startSpot[1];
 	}
+	// Put polyobj in its subsector.
 	avg.x /= po->numsegs;
 	avg.y /= po->numsegs;
-	sub = R_PointInSubsector (avg.x<<FRACBITS, avg.y<<FRACBITS);
+	sub = R_PointInSubsector (avg.x << FRACBITS, avg.y << FRACBITS);
 	if (sub->poly != NULL)
 	{
 		I_Error ("PO_TranslateToStartSpot: Multiple polyobjs in a single subsector.\n");
 	}
 	sub->poly = po;
+	// Reassign the sides of the polyobj to its new sector.
+	sector_t *sec = P_PointInSector (avg.x << FRACBITS, avg.y << FRACBITS);
+	for (i = 0; i < po->numsegs; ++i)
+	{
+		po->segs[i]->linedef->frontsector = sec;
+		po->segs[i]->linedef->sidedef[0]->sector = sec;
+		po->segs[i]->frontsector = sec;
+	}
 }
 
 //==========================================================================
diff --git a/src/r_defs.h b/src/r_defs.h
index 623e475c40..7d02fb4eb5 100644
--- a/src/r_defs.h
+++ b/src/r_defs.h
@@ -871,7 +871,7 @@ struct line_t
 	DWORD		flags;
 	DWORD		activation;	// activation type
 	int			special;
-	fixed_t		Alpha;		// <--- translucency (0-255/255=opaque)
+	fixed_t		Alpha;		// <--- translucency (0=invisibile, FRACUNIT=opaque)
 	int			id;			// <--- same as tag or set with Line_SetIdentification
 	int			args[5];	// <--- hexen-style arguments (expanded to ZDoom's full width)
 	int			firstid, nextid;