diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 940e375ee..33465a1fd 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -57,6 +57,8 @@ foreach( majver ${MAJOR_VERSIONS} )
 	endforeach( dir ${FMOD_DIR_VERSIONS} )
 endforeach( majver ${MAJOR_VERSIONS} )
 
+message( STATUS "${FMOD_DIR_VERSIONS}" )
+
 if( WIN32 )
 	if( X64 )
 		set( WIN_TYPE Win64 )
diff --git a/src/p_3dfloors.cpp b/src/p_3dfloors.cpp
index 558fb874c..15e372aca 100644
--- a/src/p_3dfloors.cpp
+++ b/src/p_3dfloors.cpp
@@ -123,8 +123,9 @@ static void P_Add3DFloor(sector_t* sec, sector_t* sec2, line_t* master, int flag
 	ffloor->top.model = ffloor->bottom.model = ffloor->model = sec2;
 	ffloor->target = sec;
 	ffloor->ceilingclip = ffloor->floorclip = NULL;
-	
-	if (!(flags&FF_THINFLOOR)) 
+	ffloor->validcount = 0;
+
+	if (!(flags&FF_THINFLOOR))
 	{
 		ffloor->bottom.plane = &sec2->floorplane;
 		ffloor->bottom.texture = &sec2->planes[sector_t::floor].Texture;
@@ -898,4 +899,4 @@ int	P_Find3DFloor(sector_t * sec, fixed_t x, fixed_t y, fixed_t z, bool above, b
 	return -1;
 }
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/p_setup.cpp b/src/p_setup.cpp
index 1d20a6f7a..1b691cfee 100644
--- a/src/p_setup.cpp
+++ b/src/p_setup.cpp
@@ -1653,6 +1653,7 @@ void P_LoadThings (MapData * map)
 
 		memset (&mti[i], 0, sizeof(mti[i]));
 
+		mti[i].Conversation = 0;
 		mti[i].SkillFilter = MakeSkill(flags);
 		mti[i].ClassFilter = 0xffff;	// Doom map format doesn't have class flags so spawn for all player classes
 		flags &= ~MTF_SKILLMASK;
@@ -1726,6 +1727,7 @@ void P_LoadThings2 (MapData * map)
 		mti[i].SkillFilter = MakeSkill(mti[i].flags);
 		mti[i].ClassFilter = (mti[i].flags & MTF_CLASS_MASK) >> MTF_CLASS_SHIFT;
 		mti[i].flags &= ~(MTF_SKILLMASK|MTF_CLASS_MASK);
+		mti[i].Conversation = 0;
 	}
 	delete[] mtp;
 }
diff --git a/src/r_segs.cpp b/src/r_segs.cpp
index 22ae404fb..0f1eec676 100644
--- a/src/r_segs.cpp
+++ b/src/r_segs.cpp
@@ -279,7 +279,10 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 			goto clearfog;
 		}
 	}
-	if(ds->bFakeBoundary && !(ds->bFakeBoundary & 4) || drawmode == DontDraw) goto clearfog;
+	if ((ds->bFakeBoundary && !(ds->bFakeBoundary & 4)) || drawmode == DontDraw)
+	{
+		goto clearfog;
+	}
 
 	MaskedSWall = (fixed_t *)(openings + ds->swall) - ds->x1;
 	MaskedScaleY = ds->yrepeat;
@@ -478,6 +481,7 @@ clearfog:
 	}
 	if (fake3D & FAKE3D_REFRESHCLIP)
 	{
+		assert(ds->bkup >= 0);
 		memcpy(openings + ds->sprtopclip, openings + ds->bkup, (ds->x2-ds->x1+1) * 2);
 	}
 	else
@@ -814,7 +818,7 @@ void R_RenderFakeWallRange (drawseg_t *ds, int x1, int x2)
 				rover->bottom.plane->Zat0() >= sclipTop ||
 				rover->top.plane->Zat0() <= floorheight)
 			{
-				if (i == backsector->e->XFloor.ffloors.Size() - 1)
+				if ((unsigned)i == backsector->e->XFloor.ffloors.Size() - 1)
 				{
 					passed = 1;
 				}
@@ -855,7 +859,7 @@ void R_RenderFakeWallRange (drawseg_t *ds, int x1, int x2)
 					break;
 				}
 				// nothing
-				if (!fover || j == frontsector->e->XFloor.ffloors.Size())
+				if (!fover || (unsigned)j == frontsector->e->XFloor.ffloors.Size())
 				{
 					break;
 				}
@@ -912,7 +916,7 @@ void R_RenderFakeWallRange (drawseg_t *ds, int x1, int x2)
 					fover = NULL; // visible
 					break;
 				}
-				if (fover && j != frontsector->e->XFloor.ffloors.Size())
+				if (fover && (unsigned)j != frontsector->e->XFloor.ffloors.Size())
 				{ // not visible
 					break;
 				}