diff --git a/polymer/eduke32/build/Makefile.shared b/polymer/eduke32/build/Makefile.shared
index fb0bd36a5..21e71b827 100644
--- a/polymer/eduke32/build/Makefile.shared
+++ b/polymer/eduke32/build/Makefile.shared
@@ -3,7 +3,8 @@
 ENGINELIB=libengine.a
 EDITORLIB=libbuild.a
 
-SDLCONFIG	= /usr/local/bin/sdl-config
+# SDLCONFIG	= /usr/local/bin/sdl-config
+SDLCONFIG = sdl-config
 
 ifeq ($(wildcard $(SDLCONFIG)),$(SDLCONFIG))
     SDLROOT		= /usr/local
diff --git a/polymer/eduke32/build/include/build.h b/polymer/eduke32/build/include/build.h
index 093f684eb..3ae6a7c23 100644
--- a/polymer/eduke32/build/include/build.h
+++ b/polymer/eduke32/build/include/build.h
@@ -485,7 +485,7 @@ int32_t   insertsprite(int16_t sectnum, int16_t statnum);
 int32_t   deletesprite(int16_t spritenum);
 int32_t   changespritesect(int16_t spritenum, int16_t newsectnum);
 int32_t   changespritestat(int16_t spritenum, int16_t newstatnum);
-int32_t   setsprite(int16_t spritenum, vec3_t *new);
+int32_t   setsprite(int16_t spritenum, const vec3_t *new);
 
 int32_t   screencapture(char *filename, char inverseit);
 
diff --git a/polymer/eduke32/build/src/engine.c b/polymer/eduke32/build/src/engine.c
index 8620c6cfd..0d4b1a156 100644
--- a/polymer/eduke32/build/src/engine.c
+++ b/polymer/eduke32/build/src/engine.c
@@ -8265,18 +8265,13 @@ int32_t krecip(int32_t num)
 //
 // setsprite
 //
-int32_t setsprite(int16_t spritenum, vec3_t *new)
+int32_t setsprite(int16_t spritenum, const vec3_t *new)
 {
-    int16_t tempsectnum;
+    int16_t tempsectnum = sprite[spritenum].sectnum;
 
-    Bmemcpy(&sprite[spritenum], new, sizeof(vec3_t));
-/*
-    sprite[spritenum].x = newx;
-    sprite[spritenum].y = newy;
-    sprite[spritenum].z = newz;
-*/
+    if ((void *)new != (void *)&sprite[spritenum])
+        Bmemcpy(&sprite[spritenum], new, sizeof(vec3_t));
 
-    tempsectnum = sprite[spritenum].sectnum;
     updatesector(new->x,new->y,&tempsectnum);
 
     if (tempsectnum < 0)
@@ -8287,13 +8282,13 @@ int32_t setsprite(int16_t spritenum, vec3_t *new)
     return(0);
 }
 
-int32_t setspritez(int16_t spritenum, vec3_t *new)
+int32_t setspritez(int16_t spritenum, const vec3_t *new)
 {
-    int16_t tempsectnum;
+    int16_t tempsectnum = sprite[spritenum].sectnum;
 
-    Bmemcpy(&sprite[spritenum], new, sizeof(vec3_t));
+    if ((void *)new != (void *)&sprite[spritenum])
+        Bmemcpy(&sprite[spritenum], new, sizeof(vec3_t));
 
-    tempsectnum = sprite[spritenum].sectnum;
     updatesectorz(new->x,new->y,new->z,&tempsectnum);
 
     if (tempsectnum < 0)
diff --git a/polymer/eduke32/source/actors.c b/polymer/eduke32/source/actors.c
index 6a701c7b4..84607f63d 100644
--- a/polymer/eduke32/source/actors.c
+++ b/polymer/eduke32/source/actors.c
@@ -1400,17 +1400,11 @@ static void G_MoveStandables(void)
                 }
                 else if (s->owner == -2)
                 {
-                    vec3_t vect;
-
                     g_player[p].ps->oposx = g_player[p].ps->posx = s->x-(sintable[(g_player[p].ps->ang+512)&2047]>>6);
                     g_player[p].ps->oposy = g_player[p].ps->posy = s->y-(sintable[g_player[p].ps->ang&2047]>>6);
                     g_player[p].ps->oposz = g_player[p].ps->posz = s->z+(2<<8);
 
-                    vect.x = g_player[p].ps->posx;
-                    vect.y = g_player[p].ps->posy;
-                    vect.z = g_player[p].ps->posz;
-
-                    setsprite(g_player[p].ps->i,&vect);
+                    setsprite(g_player[p].ps->i,(vec3_t *)g_player[p].ps);
                     g_player[p].ps->cursectnum = sprite[g_player[p].ps->i].sectnum;
                 }
             }
@@ -6752,19 +6746,15 @@ static void G_MoveEffectors(void)   //STATNUM 3
                 TRAVERSE_CONNECT(p)
                 if (g_player[p].ps->cursectnum == s->sectnum && g_player[p].ps->on_ground)
                 {
-                    vec3_t vect;
-
                     g_player[p].ps->posx += x;
                     g_player[p].ps->posy += l;
 
                     g_player[p].ps->oposx = g_player[p].ps->posx;
                     g_player[p].ps->oposy = g_player[p].ps->posy;
 
-                    vect.x = g_player[p].ps->posx;
-                    vect.y = g_player[p].ps->posy;
-                    vect.z = g_player[p].ps->posz+PHEIGHT;
-
-                    setsprite(g_player[p].ps->i,&vect);
+                    g_player[p].ps->posz += PHEIGHT;
+                    setsprite(g_player[p].ps->i,(vec3_t *)g_player[p].ps);
+                    g_player[p].ps->posz -= PHEIGHT;
                 }
 
                 sc->floorxpanning-=x>>3;
diff --git a/polymer/eduke32/source/gameexec.c b/polymer/eduke32/source/gameexec.c
index bfcee871e..7115b5a2c 100644
--- a/polymer/eduke32/source/gameexec.c
+++ b/polymer/eduke32/source/gameexec.c
@@ -2968,6 +2968,8 @@ static int32_t X_DoExecute(void)
     case CON_IFGAPZL:
         insptr++;
         X_DoConditional(((ActorExtra[vm.g_i].floorz - ActorExtra[vm.g_i].ceilingz) >> 8) < *insptr);
+        if (sprite[vm.g_i].sectnum == g_player[vm.g_p].ps->cursectnum)
+        OSD_Printf("%d %d\n",ActorExtra[vm.g_i].floorz,ActorExtra[vm.g_i].ceilingz);
         break;
 
     case CON_IFHITSPACE: